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.

A024384 a(n) = s(1)*s(2)*...*s(n+1)*(1/s(2) - 1/s(3) + ... + c/s(n+1)), where c = (-1)^(n+1) and s(k) = 4k-3 for k = 1,2,3,...

Table of values

n a(n)
1 1
2 4
3 97
4 1064
5 32289
6 598380
7 22574145
8 593534160
9 26957380545
10 920377787220
11 48996867845025
12 2059752490500600
13 125880489657907425
14 6289366704447815100
15 434143177716332484225
16 25139306218115649924000
17 1934812150723967345546625
18 127427485507344478670350500

List of values

[1, 4, 97, 1064, 32289, 598380, 22574145, 593534160, 26957380545, 920377787220, 48996867845025, 2059752490500600, 125880489657907425, 6289366704447815100, 434143177716332484225, 25139306218115649924000, 1934812150723967345546625, 127427485507344478670350500]