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User:Charles R Greathouse IV
From OeisWiki
Vice President of the OEIS and EditorinChief, interested primarily in computational number theory and allied fields.
I can be contacted via my Talk page here, or by email: my first name (charles) at my initials (crg4) dot com. Other email addresses may work as well.
User:Charles R Greathouse IV/Averages  Early draft of an article. 
User:Charles R Greathouse IV/Chase sequences  'Chase sequences': Axxxxxx refers to Ayyyyyy, which refers to Azzzzzz... 
User:Charles R Greathouse IV/Favorites  Some of my favorite sequences. 
User:Charles R Greathouse IV/Format  Discusses the correct format of bfiles and how to repair illformatted bfiles. 
User:Charles R Greathouse IV/Junk  Disreputable publishers, journals, etc. 
User:Charles R Greathouse IV/Keywords  Information on keywords: when to use them, new ones to add, etc. 
User:Charles R Greathouse IV/Metadata  Plans for OEIS metadata: keywords, categories, the index, etc. 
User:Charles R Greathouse IV/Pari  Some PARI/GP tools. 
User:Charles R Greathouse IV/Programs  Programs in the OEIS: types, format, etc. 
User:Charles R Greathouse IV/Projects  Other mathematical databases, fingerprint databases, and similar projects 
User:Charles R Greathouse IV/Properties  Sequence properties and classes 
User:Charles R Greathouse IV/Rule of thumb  Sequences should take 1 hour to prepare for submission. 
User:Charles R Greathouse IV/Tables of special primes  Types of primes and their densities 
User:Charles R Greathouse IV/To do  Sequences to work on and bfiles to fix. 
User:Charles R Greathouse IV/Vanity  Sequences named after their discoverer. 
User:Charles R Greathouse IV/Wiki  Tools for the OEIS wiki. 
Projects:
Useful links:
 Features Wishlist, User:Russ Cox/OEIS Server Features, Suggested Projects
 Deleted sequences
 Suggested presubmit checklist
 Requested articles
 Editing history: sequence, wiki
 References on proof attempts: P vs. NP, Riemann hypothesis
[talk]
Sequence of the Day for May 21
A104748: Decimal expansion of the solution tox 2^{ x} = 1 

0.6411857445...

Sequences in the News
 Feb 01 2018 Alphabet announced a $8,589,869,056 = $A000396(6) stock buyback.
 Jan 03 2018 Largest known term of A000043 announced: 77232917.
 Nov 18 2016 PrimeGrid proves that 10223 is not a Sierpinski number, since 10223 × 2^{ 31172165} + 1 is prime. So no changes to A076336 for now.
 Sep 14 2016 Tom Greer discovers the twin primes 2996863034895 × 2^{ 1290000} ± 1 using PrimeGrid, TwinGen and LLR.
 Jan 19 2016 Largest known term of A000043 announced: 274207281, also discovered by Curtis Cooper.
 Mar 02 2014 Fredrik Johansson announces a computation of the partition number p(10^{ 20}) ≈ 1.8381765 × 10^{ 11140086259}, the largest known term of A000041.
 Dec 06 2013 Microsoft launches a challenge to find large nonMersenne primes, A138837.
Complaints
I strive to live up to the highest ethical standards. If you feel that I have wrongly rejected one of your sequences (or otherwise failed to meet the expected standards), please leave a note at Complaints About Editing where it will be reviewed. I hope that in all cases you will first contact me (through the pink comment boxes, on my user page, or by email).