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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.

A352477 a(n) is the number of different ways to partition the set of vertices of a convex n-gon into 4 intersecting polygons.

Table of values

n a(n)
12 15345
13 199914
14 1610700
15 10333050
16 57958005
17 297787980
18 1439757200
19 6662364668
20 29844152321
21 130445708134
22 559533869356
23 2365296230374
24 9885290683829
25 40944327268760
26 168389163026240
27 688631375953560
28 280357073972529
29 11373212442818370
30 46006062638648940

List of values

[15345, 199914, 1610700, 10333050, 57958005, 297787980, 1439757200, 6662364668, 29844152321, 130445708134, 559533869356, 2365296230374, 9885290683829, 40944327268760, 168389163026240, 688631375953560, 280357073972529, 11373212442818370, 46006062638648940]

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

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