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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.

A361771 Expansion of g.f. A(x) satisfying 1 = Sum_{n=-oo..+oo} x^n * (2*A(x) - (-x)^n)^(n-1).

Table of values

n a(n)
0 1
1 1
2 1
3 7
4 28
5 89
6 421
7 1898
8 7912
9 36412
10 169960
11 779139
12 3668210
13 17486938
14 83333003
15 400956919
16 1943928504
17 9455346485
18 46225027071
19 227066384875
20 1119123274755
21 5534782142253
22 27463607765186
23 136652474592260
24 681728348606011
25 3409395265172439
26 17088672210734316

List of values

[1, 1, 1, 7, 28, 89, 421, 1898, 7912, 36412, 169960, 779139, 3668210, 17486938, 83333003, 400956919, 1943928504, 9455346485, 46225027071, 227066384875, 1119123274755, 5534782142253, 27463607765186, 136652474592260, 681728348606011, 3409395265172439, 17088672210734316]

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

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