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.

A217328 Number of self-inverse permutations in S_n with longest increasing subsequence of length 8.

Table of values

n a(n)
8 1
9 8
10 71
11 461
12 3057
13 18225
14 109446
15 628652
16 3628517
17 20538209
18 116808172
19 659078098
20 3737763884
21 21153403644
22 120354760098
23 685455514294
24 3925104616303
25 22535893275064
26 130089736567064
27 753604985013128
28 4388755545268226
29 25660332309744370
30 150802834643569274

List of values

[1, 8, 71, 461, 3057, 18225, 109446, 628652, 3628517, 20538209, 116808172, 659078098, 3737763884, 21153403644, 120354760098, 685455514294, 3925104616303, 22535893275064, 130089736567064, 753604985013128, 4388755545268226, 25660332309744370, 150802834643569274]

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

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