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.

A217327 Number of self-inverse permutations in S_n with longest increasing subsequence of length 7.

Table of values

n a(n)
7 1
8 7
9 55
10 319
11 1904
12 10275
13 56135
14 294386
15 1556323
16 8086433
17 42298721
18 219795160
19 1149139210
20 5999688692
21 31506046052
22 165664633982
23 875886376212
24 4643488263933
25 24746018418741
26 132328997879066
27 711142850556217
28 3836134976520394
29 20791024498584110

List of values

[1, 7, 55, 319, 1904, 10275, 56135, 294386, 1556323, 8086433, 42298721, 219795160, 1149139210, 5999688692, 31506046052, 165664633982, 875886376212, 4643488263933, 24746018418741, 132328997879066, 711142850556217, 3836134976520394, 20791024498584110]

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

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