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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.

A331690 a(n) = Sum_{k=0..n} Stirling2(n,k) * k! * n^(n - k).

Table of values

n a(n)
0 1
1 1
2 4
3 33
4 456
5 9445
6 272448
7 10386817
8 503758720
9 30202999821
10 2189000524800
11 188349613075393
12 18954958449853440
13 2203304642871358741
14 292675996808408743936
15 44022321302156791898625
16 7438113993194856900034560
17 1401876939543892434209075581

List of values

[1, 1, 4, 33, 456, 9445, 272448, 10386817, 503758720, 30202999821, 2189000524800, 188349613075393, 18954958449853440, 2203304642871358741, 292675996808408743936, 44022321302156791898625, 7438113993194856900034560, 1401876939543892434209075581]

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

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