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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.

A258174 Sum over all Dyck paths of semilength n of products over all peaks p of x_p*y_p, where x_p and y_p are the coordinates of peak p.

Table of values

n a(n)
0 1
1 1
2 7
3 84
4 1486
5 35753
6 1111931
7 43150593
8 2035666985
9 114412223081
10 7538224510181
11 574552299138202
12 50096579094908148
13 4949493445607316419
14 549534510282406667069
15 68071071679372210762156
16 9347203754680124767253730
17 1414740620049957735248175695

List of values

[1, 1, 7, 84, 1486, 35753, 1111931, 43150593, 2035666985, 114412223081, 7538224510181, 574552299138202, 50096579094908148, 4949493445607316419, 549534510282406667069, 68071071679372210762156, 9347203754680124767253730, 1414740620049957735248175695]

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

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