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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.

A121564 Denominator of Sum_{i=1..n} i!/(i^i).

Table of values

n a(n)
0 1
1 1
2 2
3 18
4 288
5 180000
6 1620000
7 190591380000
8 780662292480000
9 46097327708651520000
10 28810829817907200000000
11 747278726094210559615027200000000
12 747278726094210559615027200000000
13 17410163370762081276553474535120146483200000000

List of values

[1, 1, 2, 18, 288, 180000, 1620000, 190591380000, 780662292480000, 46097327708651520000, 28810829817907200000000, 747278726094210559615027200000000, 747278726094210559615027200000000, 17410163370762081276553474535120146483200000000]

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

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