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.

A213190 a(0)=1, a(1)=1, a(n) = n*a(n-1) + 3*a(n-2).

Table of values

n a(n)
0 1
1 1
2 5
3 18
4 87
5 489
6 3195
7 23832
8 200241
9 1873665
10 19337373
11 218332098
12 2677997295
13 35468961129
14 504599447691
15 7675398598752
16 124320175923105
17 2136469186489041
18 38829405884572053
19 744168119366336130
20 14999850604980438759
21 317229367062688222329

List of values

[1, 1, 5, 18, 87, 489, 3195, 23832, 200241, 1873665, 19337373, 218332098, 2677997295, 35468961129, 504599447691, 7675398598752, 124320175923105, 2136469186489041, 38829405884572053, 744168119366336130, 14999850604980438759, 317229367062688222329]