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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.

A362348 a(n) = n! * Sum_{k=0..floor(n/3)} k^k / (k! * (n-3*k)!).

Table of values

n a(n)
0 1
1 1
2 1
3 7
4 25
5 61
6 1561
7 10291
8 40657
9 1754425
10 16632721
11 90479071
12 5469933481
13 67591594357
14 468224398825
15 36386954606731
16 554182030325281
17 4663003095358321
18 442756825853252257
19 8014853488848923575
20 79354642490200806841
21 8901962495566386752941

List of values

[1, 1, 1, 7, 25, 61, 1561, 10291, 40657, 1754425, 16632721, 90479071, 5469933481, 67591594357, 468224398825, 36386954606731, 554182030325281, 4663003095358321, 442756825853252257, 8014853488848923575, 79354642490200806841, 8901962495566386752941]

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

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