cp's OEIS Frontend

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.

A256752 Number of ways to place non-intersecting diagonals in a convex (n+2)-gon so as to create no hexagons.

Table of values

n a(n)
1 1
2 3
3 11
4 44
5 190
6 859
7 4015
8 19248
9 94117
10 467575
11 2353443
12 11975568
13 61505088
14 318406927
15 1659801852
16 8704865907
17 45898065978
18 243163198928
19 1293769867676
20 6910165762943
21 37036898772008
22 199140325574519
23 1073849938338566

List of values

[1, 3, 11, 44, 190, 859, 4015, 19248, 94117, 467575, 2353443, 11975568, 61505088, 318406927, 1659801852, 8704865907, 45898065978, 243163198928, 1293769867676, 6910165762943, 37036898772008, 199140325574519, 1073849938338566]

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

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