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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.

A207140 a(n) = Sum_{k=0..n} binomial(n,k) * binomial(n^2,k^2).

Table of values

n a(n)
0 1
1 2
2 10
3 407
4 56746
5 30771252
6 115106662819
7 1446405270234360
8 53819202633553797290
9 12313337704248075967333334
10 12373818231445938048765251252260
11 33156027144321617106970597265032233270
12 409476940913917468665022448013012674533441891

List of values

[1, 2, 10, 407, 56746, 30771252, 115106662819, 1446405270234360, 53819202633553797290, 12313337704248075967333334, 12373818231445938048765251252260, 33156027144321617106970597265032233270, 409476940913917468665022448013012674533441891]

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

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