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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.

A294001 Number of linear chord diagrams having n chords and no chord length larger than nine.

Table of values

n a(n)
0 1
1 1
2 3
3 15
4 105
5 945
6 10395
7 135135
8 2027025
9 34459425
10 218243025
11 1512548793
12 11451456921
13 94099903993
14 832822929881
15 7850100744697
16 77247769844585
17 766602148661941
18 7301487795390325
19 63860693057569633
20 549669975975395633
21 4765146317902742829

List of values

[1, 1, 3, 15, 105, 945, 10395, 135135, 2027025, 34459425, 218243025, 1512548793, 11451456921, 94099903993, 832822929881, 7850100744697, 77247769844585, 766602148661941, 7301487795390325, 63860693057569633, 549669975975395633, 4765146317902742829]

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

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