cp's OEIS Frontend

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.

A277431 Expansion of e.g.f.: cosh(sqrt(2)*x)/(1-x).

Table of values

n a(n)
0 1
1 1
2 4
3 12
4 52
5 260
6 1568
7 10976
8 87824
9 790416
10 7904192
11 86946112
12 1043353408
13 13563594304
14 189890320384
15 2848354805760
16 45573676892416
17 774752507171072
18 13945545129079808
19 264965357452516352
20 5299307149050328064
21 111285450130056889344
22 2448279902861251567616

List of values

[1, 1, 4, 12, 52, 260, 1568, 10976, 87824, 790416, 7904192, 86946112, 1043353408, 13563594304, 189890320384, 2848354805760, 45573676892416, 774752507171072, 13945545129079808, 264965357452516352, 5299307149050328064, 111285450130056889344, 2448279902861251567616]

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

Content is available under The OEIS End-User License Agreement.