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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.

A102075 Expansion of sec(arctanh(x)).

Table of values

n a(n)
0 1
1 1
2 13
3 445
4 28985
5 3061625
6 476598725
7 102580436725
8 29164947696625
9 10583881430448625
10 4773158983014768125
11 2618414864448579438125
12 1716782830141547577475625
13 1325775140076807694645515625

List of values

[1, 1, 13, 445, 28985, 3061625, 476598725, 102580436725, 29164947696625, 10583881430448625, 4773158983014768125, 2618414864448579438125, 1716782830141547577475625, 1325775140076807694645515625]

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

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