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.

A080252 a(n) = n*a(n-1)+4*a(n-2)-4*(n-2)*a(n-3).

Table of values

n a(n)
0 0
1 1
2 2
3 10
4 40
5 216
6 1296
7 9136
8 73088
9 658048
10 6580480
11 72386304
12 868635648
13 11292267520
14 158091745280
15 2371376195584
16 37942019129344
17 645014325264384
18 11610257854758912
19 220594899240681472
20 4411897984813629440

List of values

[0, 1, 2, 10, 40, 216, 1296, 9136, 73088, 658048, 6580480, 72386304, 868635648, 11292267520, 158091745280, 2371376195584, 37942019129344, 645014325264384, 11610257854758912, 220594899240681472, 4411897984813629440]