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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.

A013525 E.g.f.: x + (gdinv x - sinh x)/2, where gdinv = inverse-Gudermannian. Sequence has odd-indexed coefficients; others are zero.

Table of values

n a(n)
0 1
1 0
2 2
3 30
4 692
5 25260
6 1351382
7 99680490
8 9695756072
9 1202439837720
10 185185594118762
11 34674437196568950
12 7757267081778543452
13 2043536254646561946180
14 626129820701814932734142
15 220771946624511552276841410

List of values

[1, 0, 2, 30, 692, 25260, 1351382, 99680490, 9695756072, 1202439837720, 185185594118762, 34674437196568950, 7757267081778543452, 2043536254646561946180, 626129820701814932734142, 220771946624511552276841410]

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

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