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.

A189849 a(0)=1, a(1)=0, a(n) = 4*n*(n-1)*(a(n-1) + 2*(n-1)*a(n-2)).

Table of values

n a(n)
0 1
1 0
2 16
3 384
4 23040
5 2088960
6 278323200
7 50969640960
8 12290021130240
9 3774394191052800
10 1438421245702963200
11 666120016990568448000
12 368420070161105761075200
13 239869937154980747988172800
14 181598769336835394381021184000
15 158184707164826878472739618816000

List of values

[1, 0, 16, 384, 23040, 2088960, 278323200, 50969640960, 12290021130240, 3774394191052800, 1438421245702963200, 666120016990568448000, 368420070161105761075200, 239869937154980747988172800, 181598769336835394381021184000, 158184707164826878472739618816000]