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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.

A003437 Number of unlabeled Hamiltonian circuits on n-octahedron (cross polytope); also number of circular chord diagrams with n chords, modulo symmetries.

Table of values

n a(n)
1 0
2 1
3 2
4 7
5 29
6 196
7 1788
8 21994
9 326115
10 5578431
11 107026037
12 2269254616
13 52638064494
14 1325663757897
15 36021577975918
16 1050443713185782
17 32723148860301935
18 1084545122297249077
19 38105823782987999742
20 1414806404051118314077

List of values

[0, 1, 2, 7, 29, 196, 1788, 21994, 326115, 5578431, 107026037, 2269254616, 52638064494, 1325663757897, 36021577975918, 1050443713185782, 32723148860301935, 1084545122297249077, 38105823782987999742, 1414806404051118314077]

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

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