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.

A180168 a(n) = 2*a(n-1) + 5*a(n-2), a(0) = 1, a(1) = 3.

Table of values

n a(n)
0 1
1 3
2 11
3 37
4 129
5 443
6 1531
7 5277
8 18209
9 62803
10 216651
11 747317
12 2577889
13 8892363
14 30674171
15 105810157
16 364991169
17 1259033123
18 4343022091
19 14981209797
20 51677530049
21 178261109083
22 614909868411
23 2121125282237
24 7316799906529
25 25239226224243
26 87062451981131

List of values

[1, 3, 11, 37, 129, 443, 1531, 5277, 18209, 62803, 216651, 747317, 2577889, 8892363, 30674171, 105810157, 364991169, 1259033123, 4343022091, 14981209797, 51677530049, 178261109083, 614909868411, 2121125282237, 7316799906529, 25239226224243, 87062451981131]