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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.

A374605 a(n) = Sum_{k = 0..n} binomial(n, k)^2*binomial(n+k, k)*binomial(3*n+2*k, n).

Table of values

n a(n)
0 1
1 13
2 621
3 40864
4 3116125
5 258687513
6 22695228864
7 2069939892096
8 194303918495709
9 18648446389798225
10 1821631879087498621
11 180513102382789033728
12 18101940249015916366528
13 1833572727177462316881472
14 187323995560940882748187200
15 19279943156312884441303524864
16 1997221716775275248175573251037

List of values

[1, 13, 621, 40864, 3116125, 258687513, 22695228864, 2069939892096, 194303918495709, 18648446389798225, 1821631879087498621, 180513102382789033728, 18101940249015916366528, 1833572727177462316881472, 187323995560940882748187200, 19279943156312884441303524864, 1997221716775275248175573251037]

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

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