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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.

A293915 Number of linear chord diagrams having n chords and minimal chord length two.

Table of values

n a(n)
2 1
3 4
4 26
5 230
6 2509
7 32422
8 484180
9 8203519
10 155460169
11 3257843351
12 74802301553
13 1867393802229
14 50358879172771
15 1458899632505052
16 45185432509804438
17 1489952528266230695
18 52112346134820625126
19 1926974225717684659004
20 75110765705496454871866

List of values

[1, 4, 26, 230, 2509, 32422, 484180, 8203519, 155460169, 3257843351, 74802301553, 1867393802229, 50358879172771, 1458899632505052, 45185432509804438, 1489952528266230695, 52112346134820625126, 1926974225717684659004, 75110765705496454871866]

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

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