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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.

A375836 Number of chains in the poset of permutations of [n].

Table of values

n a(n)
0 1
1 1
2 3
3 17
4 165
5 2539
6 57597
7 1813797
8 75733683
9 4048845673
10 269701306809
11 21901093760303
12 2129681860984785
13 244316156443454237
14 32650648748310672739
15 5028367353617766838085
16 884047390780977994754809
17 175979907431515249448486007
18 39376198947363790655257792497

List of values

[1, 1, 3, 17, 165, 2539, 57597, 1813797, 75733683, 4048845673, 269701306809, 21901093760303, 2129681860984785, 244316156443454237, 32650648748310672739, 5028367353617766838085, 884047390780977994754809, 175979907431515249448486007, 39376198947363790655257792497]

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

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