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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.

A130426 a(n) = denominator of Sum_{k=1..n} 1/k^(n+1-k).

Table of values

n a(n)
1 1
2 2
3 12
4 72
5 1080
6 129600
7 54432000
8 22861440000
9 9601804800000
10 4032758016000000
11 18631342033920000000
12 86076800196710400000000
13 5169772619814426624000000000
14 310496543546054463037440000000000

List of values

[1, 2, 12, 72, 1080, 129600, 54432000, 22861440000, 9601804800000, 4032758016000000, 18631342033920000000, 86076800196710400000000, 5169772619814426624000000000, 310496543546054463037440000000000]

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

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