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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.

A296742 Expansion of e.g.f. arcsinh(x*sec(x)) (odd powers only).

Table of values

n a(n)
0 1
1 2
2 4
3 -8
4 2448
5 130976
6 -2342848
7 -239130240
8 99052990720
9 8918588764672
10 -2795242017684480
11 -92786315822417920
12 279479081010906828800
13 -57316070780459900928
14 -39411396653183724314673152
15 5932051008707372732672475136
16 10689040617354387626585873252352

List of values

[1, 2, 4, -8, 2448, 130976, -2342848, -239130240, 99052990720, 8918588764672, -2795242017684480, -92786315822417920, 279479081010906828800, -57316070780459900928, -39411396653183724314673152, 5932051008707372732672475136, 10689040617354387626585873252352]

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

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