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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.

A128275 Absolute values of numerators of series expansion of sinh(x)/sqrt((cosh(x))^2+(sinh(x))^2) about 0 (odd indexed coefficients only).

Table of values

n a(n)
0 1
1 5
2 121
3 1369
4 698161
5 22394737
6 25947503401
7 29819441791
8 3389281372287841
9 354891998735343073
10 1147649139272698443481
11 179707467079684030326841
12 76137452589606191547280211
13 183280927961986287722231696209
14 1163176750283121903011836076436361

List of values

[1, 5, 121, 1369, 698161, 22394737, 25947503401, 29819441791, 3389281372287841, 354891998735343073, 1147649139272698443481, 179707467079684030326841, 76137452589606191547280211, 183280927961986287722231696209, 1163176750283121903011836076436361]

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

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