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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.

A258178 Sum over all Dyck paths of semilength n of products over all peaks p of x_p^2, where x_p is the x-coordinate of peak p.

Table of values

n a(n)
0 1
1 1
2 13
3 414
4 24324
5 2279209
6 311524201
7 58467947511
8 14424374692879
9 4525566110365523
10 1759527523008436279
11 830255082140922306224
12 467382831980334193769718
13 309419146352957449765072455
14 237980526477430552734199922151
15 210427994109788912088395561755374

List of values

[1, 1, 13, 414, 24324, 2279209, 311524201, 58467947511, 14424374692879, 4525566110365523, 1759527523008436279, 830255082140922306224, 467382831980334193769718, 309419146352957449765072455, 237980526477430552734199922151, 210427994109788912088395561755374]

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

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