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.

A360716 Number of unordered pairs 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 3
5 45
6 435
7 3465
8 24794
9 165942
10 1061730
11 6578550
12 39796053
13 236309931
14 1382504669
15 7989938775
16 45704622660
17 259155482652
18 1458298435572
19 8151155034300
20 45290328792695
21 250308998693145
22 1376766613411959
23 7539656755416885
24 41126122248463038
25 223513887538508850
26 1210707873300202550
27 6537847299012919890

List of values

[0, 0, 0, 3, 45, 435, 3465, 24794, 165942, 1061730, 6578550, 39796053, 236309931, 1382504669, 7989938775, 45704622660, 259155482652, 1458298435572, 8151155034300, 45290328792695, 250308998693145, 1376766613411959, 7539656755416885, 41126122248463038, 223513887538508850, 1210707873300202550, 6537847299012919890]

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

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