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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.

A127897 Series reversion of x/(1 + 2*x + 3*x^2 + x^3).

Table of values

n a(n)
0 0
1 1
2 2
3 7
4 27
5 114
6 507
7 2342
8 11125
9 54002
10 266684
11 1335610
12 6767477
13 34629709
14 178701317
15 928903447
16 4859345882
17 25563551782
18 135153617840
19 717740916202
20 3826894116962
21 20478451476328
22 109945087353190
23 592048943478464
24 3196930550222605
25 17306392059508743
26 93905862139673832

List of values

[0, 1, 2, 7, 27, 114, 507, 2342, 11125, 54002, 266684, 1335610, 6767477, 34629709, 178701317, 928903447, 4859345882, 25563551782, 135153617840, 717740916202, 3826894116962, 20478451476328, 109945087353190, 592048943478464, 3196930550222605, 17306392059508743, 93905862139673832]

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

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