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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.

A361284 Number of unordered triples of self-avoiding paths whose sets of nodes are disjoint subsets of a set of n points on a circle; one-node paths are not allowed.

Table of values

n a(n)
1 0
2 0
3 0
4 0
5 0
6 15
7 420
8 7140
9 95760
10 1116990
11 11891880
12 118776900
13 1132182480
14 10415938533
15 93207174060
16 815777235000
17 7011723045600
18 59364660734172
19 496238466573648
20 4102968354298200
21 33602671702168800
22 272909132004479355
23 2200084921469527092
24 17618774018675345340
25 140252152286127750000

List of values

[0, 0, 0, 0, 0, 15, 420, 7140, 95760, 1116990, 11891880, 118776900, 1132182480, 10415938533, 93207174060, 815777235000, 7011723045600, 59364660734172, 496238466573648, 4102968354298200, 33602671702168800, 272909132004479355, 2200084921469527092, 17618774018675345340, 140252152286127750000]

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

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