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.

A033538 a(0)=1, a(1)=1, a(n) = 3*a(n-1) + a(n-2) + 1.

Table of values

n a(n)
0 1
1 1
2 5
3 17
4 57
5 189
6 625
7 2065
8 6821
9 22529
10 74409
11 245757
12 811681
13 2680801
14 8854085
15 29243057
16 96583257
17 318992829
18 1053561745
19 3479678065
20 11492595941
21 37957465889
22 125364993609
23 414052446717
24 1367522333761
25 4516619448001
26 14917380677765
27 49268761481297

List of values

[1, 1, 5, 17, 57, 189, 625, 2065, 6821, 22529, 74409, 245757, 811681, 2680801, 8854085, 29243057, 96583257, 318992829, 1053561745, 3479678065, 11492595941, 37957465889, 125364993609, 414052446717, 1367522333761, 4516619448001, 14917380677765, 49268761481297]