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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.

A351768 a(n) = n! * Sum_{k=0..n} k^(n-k) * (n-k)^k/k!.

Table of values

n a(n)
0 1
1 0
2 2
3 18
4 276
5 6260
6 190950
7 7523082
8 371286440
9 22356290952
10 1608686057610
11 136069954606190
12 13345029902628732
13 1500054487474871484
14 191349476316804534638
15 27464505325501082617170
16 4402551348139824475260240
17 783025812197886669354545552

List of values

[1, 0, 2, 18, 276, 6260, 190950, 7523082, 371286440, 22356290952, 1608686057610, 136069954606190, 13345029902628732, 1500054487474871484, 191349476316804534638, 27464505325501082617170, 4402551348139824475260240, 783025812197886669354545552]

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

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