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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.

A179535 a(n) = Sum_{k=0..n} binomial(n,k)^2 * binomial(n-k,k)^2 * 81^k.

Table of values

n a(n)
0 1
1 1
2 325
3 2917
4 247861
5 5937301
6 265793401
7 10705726585
8 378746444917
9 18588932910901
10 657940881863305
11 32580334626782185
12 1257522211980656425
13 59212895251349313865
14 2490039488311462939645
15 112553667120196462181437

List of values

[1, 1, 325, 2917, 247861, 5937301, 265793401, 10705726585, 378746444917, 18588932910901, 657940881863305, 32580334626782185, 1257522211980656425, 59212895251349313865, 2490039488311462939645, 112553667120196462181437]

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

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