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.

A053871 a(0)=1; a(1)=0; a(n) = 2*(n-1)*(a(n-1) + a(n-2)).

Table of values

n a(n)
0 1
1 0
2 2
3 8
4 60
5 544
6 6040
7 79008
8 1190672
9 20314880
10 387099936
11 8148296320
12 187778717632
13 4702248334848
14 127140703364480
15 3691602647581184
16 114562300528369920
17 3784124901630435328
18 132555364873399378432
19 4908221631901073295360
20 191549525877429961604096

List of values

[1, 0, 2, 8, 60, 544, 6040, 79008, 1190672, 20314880, 387099936, 8148296320, 187778717632, 4702248334848, 127140703364480, 3691602647581184, 114562300528369920, 3784124901630435328, 132555364873399378432, 4908221631901073295360, 191549525877429961604096]