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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.

A328007 Expansion of e.g.f. 1 / (2 - exp(-x) / (1 - x)).

Table of values

n a(n)
0 1
1 0
2 1
3 2
4 15
5 84
6 705
7 6222
8 65779
9 765608
10 9999333
11 143009250
12 2235857943
13 37833382716
14 689729792713
15 13469761663862
16 280613761282875
17 6211105772020560
18 145566258957724845
19 3601055676894146442
20 93772841089130278495
21 2563969299245947753700
22 73443322391840827563921

List of values

[1, 0, 1, 2, 15, 84, 705, 6222, 65779, 765608, 9999333, 143009250, 2235857943, 37833382716, 689729792713, 13469761663862, 280613761282875, 6211105772020560, 145566258957724845, 3601055676894146442, 93772841089130278495, 2563969299245947753700, 73443322391840827563921]

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

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