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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.

A157316 G.f.: A(x) = tanh( Sum_{n>=0} 2^((2n+1)^2) * x^(2n+1)/(2n+1) ), with zero terms omitted.

Table of values

n a(n)
0 2
1 168
2 6710208
3 80421395017344
4 268650181814894062310400
5 241677817414364648836194235222953984
6 57560679870262286682598360350282651217048664506368

List of values

[2, 168, 6710208, 80421395017344, 268650181814894062310400, 241677817414364648836194235222953984, 57560679870262286682598360350282651217048664506368]

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

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