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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.

A293917 Number of linear chord diagrams having n chords and minimal chord length four.

Table of values

n a(n)
4 1
5 19
6 252
7 3441
8 52938
9 919077
10 17783732
11 379205917
12 8832657552
13 223147872970
14 6078406509776
15 177602480890788
16 5541376133638552
17 183896037042429100
18 6468180930063929404
19 240368899912444102612
20 9410883311417206598912
21 387192534875365889313239

List of values

[1, 19, 252, 3441, 52938, 919077, 17783732, 379205917, 8832657552, 223147872970, 6078406509776, 177602480890788, 5541376133638552, 183896037042429100, 6468180930063929404, 240368899912444102612, 9410883311417206598912, 387192534875365889313239]

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

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