cp's OEIS Frontend

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.

A009837 Expansion of tanh(x)tan(x)/2 in powers of x^(4*n+2).

Table of values

n a(n)
0 1
1 56
2 46336
3 182844416
4 2205641015296
5 63603482126974976
6 3748468097940723859456
7 404963012992964559934324736
8 74035562436962891333631597346816
9 21543523644222111882868080329093021696
10 9505937948357641883573662624456235995365376

List of values

[1, 56, 46336, 182844416, 2205641015296, 63603482126974976, 3748468097940723859456, 404963012992964559934324736, 74035562436962891333631597346816, 21543523644222111882868080329093021696, 9505937948357641883573662624456235995365376]

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

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