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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.

A385310 Expansion of e.g.f. 1/(1 - 2 * x * cos(x))^(1/2).

Table of values

n a(n)
0 1
1 1
2 3
3 12
4 69
5 500
6 4455
7 46928
8 571977
9 7914384
10 122585355
11 2100940864
12 39470867469
13 806555184448
14 17808628411119
15 422498774818560
16 10717948285126545
17 289501146405400832
18 8295124400250875667
19 251300745071590317056
20 8025654235707259740885
21 269482309052945201181696

List of values

[1, 1, 3, 12, 69, 500, 4455, 46928, 571977, 7914384, 122585355, 2100940864, 39470867469, 806555184448, 17808628411119, 422498774818560, 10717948285126545, 289501146405400832, 8295124400250875667, 251300745071590317056, 8025654235707259740885, 269482309052945201181696]

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

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