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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.

A047798 a(n) = Sum_{k=0..n} C(n,k)*Stirling2(n,k)^2.

Table of values

n a(n)
0 1
1 1
2 3
3 31
4 443
5 9006
6 241147
7 7956579
8 318973867
9 15061651528
10 824029357046
11 51526959899570
12 3636995712432667
13 287053182699020609
14 25126145438688593769
15 2421761360666327615911
16 255466264644678162575691
17 29336098320197429601856772

List of values

[1, 1, 3, 31, 443, 9006, 241147, 7956579, 318973867, 15061651528, 824029357046, 51526959899570, 3636995712432667, 287053182699020609, 25126145438688593769, 2421761360666327615911, 255466264644678162575691, 29336098320197429601856772]

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

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