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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.

A009399 Expansion of log(1+tanh(x)*x).

Table of values

n a(n)
0 0
1 2
2 -20
3 576
4 -33312
5 3258880
6 -485139456
7 102300807168
8 -29028932390912
9 10668077137133568
10 -4929291212351078400
11 2797060130323340197888
12 -1912137417504544127975424
13 1550018044651811766917922816

List of values

[0, 2, -20, 576, -33312, 3258880, -485139456, 102300807168, -29028932390912, 10668077137133568, -4929291212351078400, 2797060130323340197888, -1912137417504544127975424, 1550018044651811766917922816]

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

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