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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.

A009229 Expansion of e.g.f. exp(sinh(x)*cosh(x)).

Table of values

n a(n)
0 1
1 1
2 1
3 5
4 17
5 57
6 337
7 1661
8 9697
9 68529
10 451809
11 3570613
12 29324913
13 247557481
14 2348275633
15 22399292077
16 229227939521
17 2476740370529
18 27378158737089
19 323000223133285
20 3912000089144273
21 49350756905258905
22 649905519911431953
23 8776449485870211549

List of values

[1, 1, 1, 5, 17, 57, 337, 1661, 9697, 68529, 451809, 3570613, 29324913, 247557481, 2348275633, 22399292077, 229227939521, 2476740370529, 27378158737089, 323000223133285, 3912000089144273, 49350756905258905, 649905519911431953, 8776449485870211549]

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

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