The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A268844 Number of sequences with n copies each of 1,2,...,8 and longest increasing subsequence of length 8. 3
 1, 192621953, 8445885515991841, 211301962987912098409729, 3969183064899133655031651559801, 63178476289432401423971737795658030945, 909546798992441266072332791609067485208949369, 12324197596430667064913735085330208112438377122058241 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Alois P. Heinz, Table of n, a(n) for n = 1..60 J. D. Horton and A. Kurn, Counting sequences with complete increasing subsequences, Congressus Numerantium, 33 (1981), 75-80. MR 681905 FORMULA a(n) ~ 8^(8*n + 1/2) / (2*Pi*n)^(7/2). - Vaclav Kotesovec, Mar 03 2016 CROSSREFS Column k=8 of A047909. Sequence in context: A267770 A209597 A251514 * A015368 A317287 A132205 Adjacent sequences:  A268841 A268842 A268843 * A268845 A268846 A268847 KEYWORD nonn AUTHOR Alois P. Heinz, Feb 14 2016 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 1 16:44 EST 2021. Contains 349430 sequences. (Running on oeis4.)