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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.

A361713 a(n) = Sum_{k = 0..n-1} binomial(n,k)^2 * binomial(n+k-1,k)^2.

Table of values

n a(n)
0 0
1 1
2 17
3 406
4 10257
5 268126
6 7213166
7 198978074
8 5609330705
9 161095277710
10 4700175389142
11 138986764820410
12 4157185583199534
13 125568602682092818
14 3825026187780837266
15 117376010145070696906
16 3625095243230562818065
17 112596592142021739522670
18 3514965607470183733302470

List of values

[0, 1, 17, 406, 10257, 268126, 7213166, 198978074, 5609330705, 161095277710, 4700175389142, 138986764820410, 4157185583199534, 125568602682092818, 3825026187780837266, 117376010145070696906, 3625095243230562818065, 112596592142021739522670, 3514965607470183733302470]

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

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