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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.

A342107 a(n) = Sum_{k=0..n} (4*k)!/k!^4.

Table of values

n a(n)
0 1
1 25
2 2545
3 372145
4 63435145
5 11796180169
6 2320539673225
7 474838887231625
8 100035931337622625
9 21552788197602942625
10 4726913659271173170145
11 1051798742538350304851425
12 236861100204680963085573025

List of values

[1, 25, 2545, 372145, 63435145, 11796180169, 2320539673225, 474838887231625, 100035931337622625, 21552788197602942625, 4726913659271173170145, 1051798742538350304851425, 236861100204680963085573025]

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

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