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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.

A324447 Number of labeled cyclic chord diagrams with n chords such that the minimal chord length equals three.

Table of values

n a(n)
3 1
4 6
5 57
6 678
7 9375
8 146334
9 2555228
10 49498389
11 1054882116
12 24545326598
13 619415271672
14 16854164945997
15 491956017936245
16 15335174679459134
17 508475723159116576
18 17870522292434937714
19 663618269365250877446
20 25964529622925026990819
21 1067602511902741954478695

List of values

[1, 6, 57, 678, 9375, 146334, 2555228, 49498389, 1054882116, 24545326598, 619415271672, 16854164945997, 491956017936245, 15335174679459134, 508475723159116576, 17870522292434937714, 663618269365250877446, 25964529622925026990819, 1067602511902741954478695]

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

Content is available under The OEIS End-User License Agreement.