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.

A295231 Numerators of (-1)^(n+1) * (2*n)! * (2^(2*n)+1)/(B_{2*n} * 2^(4*n-1)), where B_{n} is the Bernoulli number.

Table of values

n a(n)
0 -4
1 15
2 765
3 61425
4 1214325
5 95893875
6 2615987248875
7 298915241625
8 10670785663663125
9 10218227413637368125
10 1605716856726047690625
11 56404413605424162403125
12 3387648475383059302662121875
13 744538093174369303262578125

List of values

[-4, 15, 765, 61425, 1214325, 95893875, 2615987248875, 298915241625, 10670785663663125, 10218227413637368125, 1605716856726047690625, 56404413605424162403125, 3387648475383059302662121875, 744538093174369303262578125]