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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.

A184890 a(n) = C(2n,n) * (5^n/n!^2) * Product_{k=0..n-1} (5k+2)*(5k+3).

Table of values

n a(n)
0 1
1 60
2 12600
3 3640000
4 1218262500
5 443837394000
6 170877396690000
7 68390813462400000
8 28171137810976875000
9 11864338450927462500000
10 5085530033605547526000000
11 2211345876971860770960000000

List of values

[1, 60, 12600, 3640000, 1218262500, 443837394000, 170877396690000, 68390813462400000, 28171137810976875000, 11864338450927462500000, 5085530033605547526000000, 2211345876971860770960000000]

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

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