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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.

A383379 a(n) = n! * Sum_{k=0..n} (-n)^(n-k) * binomial(n+k,n)/(n-k)!.

Table of values

n a(n)
0 1
1 1
2 4
3 21
4 176
5 1765
6 22464
7 331177
8 5692672
9 110286441
10 2394828800
11 57389046781
12 1507401363456
13 43018690418509
14 1326170009092096
15 43905977120300625
16 1553942522589937664
17 58544111242378404433
18 2339326913228257886208
19 98816004834223734304741

List of values

[1, 1, 4, 21, 176, 1765, 22464, 331177, 5692672, 110286441, 2394828800, 57389046781, 1507401363456, 43018690418509, 1326170009092096, 43905977120300625, 1553942522589937664, 58544111242378404433, 2339326913228257886208, 98816004834223734304741]

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

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