cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A279299 Number of permutations of [n] having exactly ten (possibly overlapping) doubledescents.

Table of values

n a(n)
12 1
13 24
14 16654
15 607995
16 52687209
17 2225347678
18 112136485958
19 4652156989635
20 196794669764694
21 7848158942463262
22 311532163358831142
23 12142236428089109402
24 472096448836605015907
25 18301483090810860748890
26 711486425957970444213722
27 27780774432495984165279729

List of values

[1, 24, 16654, 607995, 52687209, 2225347678, 112136485958, 4652156989635, 196794669764694, 7848158942463262, 311532163358831142, 12142236428089109402, 472096448836605015907, 18301483090810860748890, 711486425957970444213722, 27780774432495984165279729]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.