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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.

A097967 a(n) = Sum_{k=1..n} (P(n,k) + C(n,k)).

Table of values

n a(n)
0 0
1 2
2 7
3 22
4 79
5 356
6 2019
7 13826
8 109855
9 986920
10 9865123
11 108507158
12 1302065439
13 16926805676
14 236975181187
15 3554627504842
16 56874039618751
17 966858672535760
18 17403456103546563
19 330665665962928286
20 6613313319249128575

List of values

[0, 2, 7, 22, 79, 356, 2019, 13826, 109855, 986920, 9865123, 108507158, 1302065439, 16926805676, 236975181187, 3554627504842, 56874039618751, 966858672535760, 17403456103546563, 330665665962928286, 6613313319249128575]

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

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