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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.

A357682 a(n) = Sum_{k=0..floor(n/2)} n^k * Stirling2(n,2*k).

Table of values

n a(n)
0 1
1 0
2 2
3 9
4 44
5 325
6 2742
7 24794
8 250168
9 2796795
10 33842610
11 439337085
12 6100179780
13 90139379928
14 1409779442190
15 23242554452745
16 402652762232048
17 7308371248274949
18 138605556986785674
19 2740167375732394378
20 56350604098768558140
21 1203156656491936711635

List of values

[1, 0, 2, 9, 44, 325, 2742, 24794, 250168, 2796795, 33842610, 439337085, 6100179780, 90139379928, 1409779442190, 23242554452745, 402652762232048, 7308371248274949, 138605556986785674, 2740167375732394378, 56350604098768558140, 1203156656491936711635]

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

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