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.

A218260 E.g.f.: Sum_{n>=0} Product_{k=1..n} tanh((2*k-1)*x).

Table of values

n a(n)
0 1
1 1
2 6
3 88
4 2280
5 92416
6 5393376
7 428428288
8 44450655360
9 5836916064256
10 946245183223296
11 185613384522661888
12 43330332249288714240
13 11871318610487327850496
14 3772031142226151742038016
15 1375871976238663365598117888

List of values

[1, 1, 6, 88, 2280, 92416, 5393376, 428428288, 44450655360, 5836916064256, 946245183223296, 185613384522661888, 43330332249288714240, 11871318610487327850496, 3772031142226151742038016, 1375871976238663365598117888]