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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.

A009416 Expansion of e.g.f. log(1+x)*cosh(x).

Table of values

n a(n)
0 0
1 1
2 -1
3 5
4 -12
5 49
6 -225
7 1301
8 -8848
9 69441
10 -616185
11 6095429
12 -66475596
13 792143793
14 -10238194057
15 142633278997
16 -2130537219840
17 33964965659649
18 -575573407212753
19 10331348137881349
20 -195807849389362540
21 3907452790559751857
22 -81892400673047263761
23 1798373345567005989781
24 -41294565798306731368272
25 989581607891834678407745

List of values

[0, 1, -1, 5, -12, 49, -225, 1301, -8848, 69441, -616185, 6095429, -66475596, 792143793, -10238194057, 142633278997, -2130537219840, 33964965659649, -575573407212753, 10331348137881349, -195807849389362540, 3907452790559751857, -81892400673047263761, 1798373345567005989781, -41294565798306731368272, 989581607891834678407745]

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

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