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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.

A258179 Sum over all Dyck paths of semilength n of products over all peaks p of y_p^2, where y_p is the y-coordinate of peak p.

Table of values

n a(n)
0 1
1 1
2 5
3 34
4 312
5 3649
6 52161
7 889843
8 17796555
9 411120395
10 10838039407
11 322752018060
12 10762432731362
13 398802951148255
14 16312276452291935
15 732189190349581890
16 35876807697443520000
17 1910107567584518883891
18 110035833179472385285367
19 6832792252684597270659486

List of values

[1, 1, 5, 34, 312, 3649, 52161, 889843, 17796555, 411120395, 10838039407, 322752018060, 10762432731362, 398802951148255, 16312276452291935, 732189190349581890, 35876807697443520000, 1910107567584518883891, 110035833179472385285367, 6832792252684597270659486]

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

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