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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.

A292693 Sum over all Dyck paths of semilength n of products over all peaks p of (x_p+n*y_p)/y_p, where x_p and y_p are the coordinates of peak p.

Table of values

n a(n)
0 1
1 2
2 18
3 268
4 5500
5 143046
6 4491340
7 164927288
8 6926613912
9 327225762250
10 17166979868764
11 989951268341124
12 62226648527948008
13 4234070369464440974
14 310027061374942635000
15 24305529829528548674800
16 2031272969339630171158576
17 180267634530033586511045778

List of values

[1, 2, 18, 268, 5500, 143046, 4491340, 164927288, 6926613912, 327225762250, 17166979868764, 989951268341124, 62226648527948008, 4234070369464440974, 310027061374942635000, 24305529829528548674800, 2031272969339630171158576, 180267634530033586511045778]

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

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