Deleted sequences

• Sequences are occasionally removed from the OEIS and their A-numbers recycled.
• Remember that if you delete a sequence, you must also delete (or update) all references to it in other entries—first do a search for the A-number in oeis.org, then here in the OEIS wiki (in case there are references to it in the wiki pages).
• If the deleted sequence had a b-file, that must be deleted also, or it will cause problems when the A-number is recycled. To delete a b-file, contact David Applegate, Russ Cox, Charles R Greathouse IV, or N. J. A. Sloane.
• Sequences that have been in the OEIS for a long time (even if they already have keyword "dead") should not be deleted. If they are incorrect or duplicates they can be given the keyword "dead".

Reasons for deletion

There are several reasons why a sequence may be deleted from the OEIS. Typically, this happens if the sequence is:

• a duplicate of a sequence already in the OEIS,
• an erroneous version of a sequence already in the OEIS,
• ill-defined (e.g. eventually some term has multiple or ambiguous values, or the sequence is time-dependent),
• withdrawn by the author,
• does not contain enough terms (usually we need at least four terms),
• too artificial or contrived,
• not of general interest (NOGI),
• contains unacceptable language,
• a new submission which has been on the Sequences awaiting review (Proposed drafts or Pending changes) list for over three months. (This usually happens when the author does not respond to the editors' questions.)

Some advice

To ensure that your sequence is not deleted:

• Be very careful when calculating the sequence;
• Give a precise definition;
• Check that the sequence (even without the initial terms) is not already in the OEIS;
• Write in correct English;
• Include a comment saying why the sequence is interesting;
• Give an example;
• Say how you computed the sequence;
• Give a computer program.

List of deleted sequences

This is a list of sequences which have been deleted, starting from the most recent.

• "rifo" means "retired in favor of" (in other words, "the latter sequence is preferable").
• "NOGI" means "Rejected because not of general interest".

One can use either a simple dash or hyphen (-) or an — (—) before a signature.

October 2019

• A326442 (Wisman) duplicate of A325538. R. J. Mathar (talk) 04:06, 9 October 2019 (EDT)
• A327893 (Juri-Stepan Gerasimov) duplicate of A123047 — Editors, Oct 08 2019
• A327468 (Sloane) rifo A324791 - N. J. A. Sloane 22:17, 3 October 2019 (EDT)
• A328044 (Leonardo Sznajder) withdrawn. - Felix Fröhlich (talk) 07:27, 3 October 2019 (EDT)
• A160053 (Zak Seidov) marked as duplicate of A140612. - Max Alekseyev (talk) 09:57, 8 October 2019 (EDT)

September 2019

• A326493 (Curtz) random, NOGI. - Sean A. Irvine (talk) 14:21, 23 September 2019 (NZST)
• A327444 (Sloane) rifo A006598 - N. J. A. Sloane 20:57, 13 September 2019 (EDT)
• A326575, A326576 (Garth A. T. Rose) withdrawn. - Felix Fröhlich (talk) 18:03, 10 September 2019 (EDT)
• A327294, A327238 (Kimberling) withdrawn, duplicate of A190893, A197879 - editors 08 Sep 2019

August 2019

• A309691, A309691 (Hurt) duplicates of A026923, A026927 - R. J. Mathar (talk) 04:21, 23 August 2019 (EDT)
• A308652, A308653 (Kai Wang) withdrawn. - Sean A. Irvine (talk) 09:01, 21 August 2019 (NZST)
• A164522, A164557, A164575 (Gary Adamson), not well defined, unrepairable, NOGI - N. J. A. Sloane 21:09, 11 August 2019 (EDT)
• A309595 (Philip Mizzi) duplicate, withdrawn. - Sean A. Irvine (talk) 09:19, 10 August 2019 (NZST)
• A309210 (Sloane) rifo A265011 - N. J. A. Sloane 10:47, 9 August 2019 (EDT)
• A308404 (Jinyuan Wang) withdrawn. - Felix Fröhlich (talk) 04:44, 4 August 2019 (EDT)
• A308724 (Sudipta Mallick) duplicate, withdrawn. - Sean A. Irvine (talk) 10:00, 4 August 2019 (NZST)

July 2019

• A325152 (B. Schott) rifo A281625. - Editors, OEIS, Jul 31 2019
• A326295, A326297, A326298, etc (Matthias Wenzel) NOGI - N. J. A. Sloane 08:20, 31 July 2019 (EDT)
• A306245 (Dàvide Ceriani) NOGI -- Bruno Berselli, Jul 28 2019
• A308421 (Jamie Morken) withdrawn. - Sean A. Irvine (talk) 09:04, 25 July 2019 (NZST)
• A309004 (Gordey Egorov) duplicate, withdrawn. - Sean A. Irvine (talk) 11:24, 22 July 2019 (NZST)
• A308898 (Donghwi Park) withdrawn. - Felix Fröhlich (talk) 05:15, 16 July 2019 (EDT)
• A325202-A325204 (B. Otto) rifo A036775-A036777. N. J. A. Sloane 01:22, 13 July 2019 (EDT)
• A326355 (Stefano Spezia) withdrawn. - Felix Fröhlich (talk) 14:35, 10 July 2019 (EDT)
• A308673 (Philip Kalisman) withdrawn. - Sean A. Irvine (talk) 16:42, 7 July 2019 (NZST)
• A307105 (Philip Kalisman) withdrawn. - Sean A. Irvine (talk) 15:52, 7 July 2019 (NZST)

June 2019

• A308729 (Paul Curtz) withdrawn. - Felix Fröhlich (talk) 23:57, 28 June 2019 (EDT)
• A326118 (Charlie Neder) withdrawn. - Felix Fröhlich (talk) 04:22, 8 June 2019 (EDT)

May 2019

• A322577 (W. Lang) rifo A070063. - N. J. A. Sloane 15:26, 26 May 2019 (EDT)
• A307988 (Curtz) random, NOGI - Felix Fröhlich (talk) 07:38, 22 May 2019 (EDT)
• A307637 (Schoenfield and Sloane) rifo A158124 - N. J. A. Sloane 09:22, 6 May 2019 (EDT)
• A321712 (G. Coserea) rifo A270562 - N. J. A. Sloane 12:57, 3 May 2019 (EDT)

Apr 2019

• A306433 (Paolo Galliani) withdrawn - Felix Fröhlich (talk) 15:04, 30 April 2019 (EDT)
• A307716 (Robert Price) duplicate of A263618, withdrawn — Editors, Apr 25 2019
• A307304 (Sloane) erroneous version of A019988 - N. J. A. Sloane 12:09, 17 April 2019 (EDT)
• A307485 (Felix Fröhlich) withdrawn in order to replace it with a more interesting version - Felix Fröhlich (talk) 04:50, 13 April 2019 (EDT)
• A306601 (P. Maiorana) withdrawn by author - N. J. A. Sloane 21:14, 10 April 2019 (EDT)
• A306237 (Jinyuan Wang) rifo A289398 - N. J. A. Sloane 08:25, 10 April 2019 (EDT)
• A307372 (Somos) duplicate of A056771 - R. J. Mathar (talk) 13:09, 9 April 2019 (EDT)

Mar 2019

• A307050 (Curtz) NOGI -- Heinz and Charles R Greathouse IV (talk) 19:05, 22 March 2019 (EDT)
• A306529, A306566, A306618, A306619 (Sally Moite) NOGI - N. J. A. Sloane 00:28, 19 March 2019 (EDT)
• A306777 (Felix Fröhlich) withdrawn, rifo A278701. - Felix Fröhlich (talk) 11:25, 11 March 2019 (EDT)

Feb 2019

• A324295 (Wu) duplicate of A217157 - R. J. Mathar (talk) 13:16, 28 February 2019 (EST)
• A323812 (Karssen) duplicate of A323714 - R. J. Mathar (talk) 08:02, 20 February 2019 (EST)
• A324236 A324237 A324238 A324239 A324241 A324242 (Schmidt) duplicates of A324088 A324089 A324090 A324091 A324092 A324093 - R. J. Mathar (talk) 07:51, 20 February 2019 (EST)
• A323844, A323845 (Don Knuth) when corrected, same as A252876, A229428. - N. J. A. Sloane 11:19, 9 February 2019 (EST)
• A323735 (Schoenfield) merged into A092120 - N. J. A. Sloane 12:33, 8 February 2019 (EST)

Jan 2019

• A322286 (Noirel) duplicate of A322288 - R. J. Mathar (talk) 04:20, 1 February 2019 (EST)
• A323726 (Felix Fröhlich) duplicate of A139283, withdrawn. - Felix Fröhlich (talk) 08:34, 29 January 2019 (EST)
• A319297 (Krizek) rifo A221219 - R. J. Mathar (talk) 04:14, 29 January 2019 (EST)
• A322446 (FERREOL) duplicate of A117633 - R. J. Mathar (talk) 03:51, 29 January 2019 (EST)
• A319199 (McGinnis) duplicate of A036570 - R. J. Mathar (talk) 03:49, 29 January 2019 (EST)
• A323617 (Jianing Song) withdrawn - Georg Fischer (talk) 00:53, 22 January 2019 (EST)
• A296050 (A J Masad) NOGI - N. J. A. Sloane 17:45, 21 January 2019 (EST)
• A299783-A299792 (Omar Pol), NOGI - N. J. A. Sloane 12:37, 21 January 2019 (EST)
• A322473 (Robert Price) duplicate of A305352 — editors
• A322934 (Juri-Stepan Gerasimov) withdrawn — Felix Fröhlich (talk) 12:34, 14 January 2019 (EST)
• A322504 (Russell) duplicate of A321946 - R. J. Mathar (talk) 06:02, 9 January 2019 (EST)
• A316712 (W. Lang) duplicate of A276383 - N. J. A. Sloane 19:23, 4 January 2019 (EST)
• A322998 (Felix Fröhlich) withdrawn — Felix Fröhlich (talk) 14:01, 2 January 2019 (EST)

Older entries

• Deleted sequences/2018
• Deleted sequences/2017
• Deleted sequences/2016
• Deleted sequences/2015
• Deleted sequences/2014
• Deleted sequences/2013
• Deleted sequences/2012
• Deleted sequences/2011
• Deleted sequences/2010
• Deleted old-list (Deleted sequences 1996 to Nov 25 2010)

See also

• Examples of what not to submit
• Disallowed sequences (An unapproved page — needs extensive editing. - N. J. A. Sloane 11:26, 3 June 2018 (EDT))