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.

A187870 Numerator of the coefficient of x^(2n) in the expansion of 1/x^4 - 1/(3*x^2) - 1/(x^3*arctanh(x)).

Table of values

n a(n)
0 4
1 44
2 428
3 10196
4 10719068
5 25865068
6 5472607916
7 74185965772
8 264698472181028
9 2290048394728148
10 19435959308462817284
11 2753151578548809148
12 20586893910854623222436
13 134344844535611780572028924

List of values

[4, 44, 428, 10196, 10719068, 25865068, 5472607916, 74185965772, 264698472181028, 2290048394728148, 19435959308462817284, 2753151578548809148, 20586893910854623222436, 134344844535611780572028924]