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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.

A345081 a(0) = 1; a(n) = 8 * Sum_{k=1..n} binomial(n,k) * a(k-1).

Table of values

n a(n)
0 1
1 8
2 80
3 856
4 9824
5 119912
6 1547376
7 21007992
8 298874496
9 4440618120
10 68706037904
11 1104224971416
12 18394192882336
13 316974497161384
14 5640790811468976
15 103503851543959224
16 1955546066369814208
17 37994858794236710088
18 758272809049577019600
19 15527828509092566876888

List of values

[1, 8, 80, 856, 9824, 119912, 1547376, 21007992, 298874496, 4440618120, 68706037904, 1104224971416, 18394192882336, 316974497161384, 5640790811468976, 103503851543959224, 1955546066369814208, 37994858794236710088, 758272809049577019600, 15527828509092566876888]

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

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