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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.

A381341 Expansion of e.g.f. exp( x * cosh(sqrt(2)*x) ).

Table of values

n a(n)
0 1
1 1
2 1
3 7
4 25
5 81
6 601
7 3207
8 18705
9 156385
10 1087441
11 8962823
12 84001897
13 732712241
14 7487525865
15 78537490951
16 831722893217
17 9804469109953
18 115549730623009
19 1431784628480007
20 18795444460125241
21 248964703826005777
22 3487888859183694329
23 50283005924345951111

List of values

[1, 1, 1, 7, 25, 81, 601, 3207, 18705, 156385, 1087441, 8962823, 84001897, 732712241, 7487525865, 78537490951, 831722893217, 9804469109953, 115549730623009, 1431784628480007, 18795444460125241, 248964703826005777, 3487888859183694329, 50283005924345951111]

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

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