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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.

A258175 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 2
2 12
3 114
4 1448
5 22770
6 424164
7 9095450
8 220023184
9 5914998594
10 174682531260
11 5614908340866
12 194967208057272
13 7267467723747218
14 289270983756577620
15 12239218862861690250
16 548301077168477951520
17 25918121712918957399426
18 1288797080051656060595820

List of values

[1, 2, 12, 114, 1448, 22770, 424164, 9095450, 220023184, 5914998594, 174682531260, 5614908340866, 194967208057272, 7267467723747218, 289270983756577620, 12239218862861690250, 548301077168477951520, 25918121712918957399426, 1288797080051656060595820]

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

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