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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.

A374676 a(n) = Sum_{k=0..n} binomial(n+k-1,n) * binomial(n+k,n)^2.

Table of values

n a(n)
0 1
1 4
2 117
3 4416
4 191025
5 8959098
6 443175257
7 22764880288
8 1202693106969
9 64935435950760
10 3567189106107044
11 198746486074429164
12 11203798260525398593
13 637866038409406067394
14 36624374381748740836905
15 2118319467225018572438976
16 123307986154526506959597225

List of values

[1, 4, 117, 4416, 191025, 8959098, 443175257, 22764880288, 1202693106969, 64935435950760, 3567189106107044, 198746486074429164, 11203798260525398593, 637866038409406067394, 36624374381748740836905, 2118319467225018572438976, 123307986154526506959597225]

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

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