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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.

A385281 Expansion of e.g.f. 1/(1 - 2 * x * cosh(2*x))^(1/2).

Table of values

n a(n)
0 1
1 1
2 3
3 27
4 249
5 2825
6 41355
7 708883
8 13888497
9 309267729
10 7698772755
11 211585744139
12 6367841422569
13 208299923870233
14 7357493992966299
15 279095125351544835
16 11316313498670411745
17 488403056864943302177
18 22355228989851909617187
19 1081663315375339026249211

List of values

[1, 1, 3, 27, 249, 2825, 41355, 708883, 13888497, 309267729, 7698772755, 211585744139, 6367841422569, 208299923870233, 7357493992966299, 279095125351544835, 11316313498670411745, 488403056864943302177, 22355228989851909617187, 1081663315375339026249211]

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

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