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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.

A217284 a(n) = Sum_{k=0..n} (n!/k!)^3.

Table of values

n a(n)
0 1
1 2
2 17
3 460
4 29441
5 3680126
6 794907217
7 272653175432
8 139598425821185
9 101767252423643866
10 101767252423643866001
11 135452212975869985647332
12 234061424022303335198589697
13 514232948577000427431301564310
14 1411055210895289172871491492466641
15 4762311336771600958441283787074913376

List of values

[1, 2, 17, 460, 29441, 3680126, 794907217, 272653175432, 139598425821185, 101767252423643866, 101767252423643866001, 135452212975869985647332, 234061424022303335198589697, 514232948577000427431301564310, 1411055210895289172871491492466641, 4762311336771600958441283787074913376]

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

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