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.

A133448 a(n) = 3*a(n-1) - a(n-3) + 3*a(n-4), with initial values 2,5,13,40.

Table of values

n a(n)
0 2
1 5
2 13
3 40
4 121
5 365
6 1094
7 3281
8 9841
9 29524
10 88573
11 265721
12 797162
13 2391485
14 7174453
15 21523360
16 64570081
17 193710245
18 581130734
19 1743392201
20 5230176601
21 15690529804
22 47071589413
23 141214768241
24 423644304722
25 1270932914165
26 3812798742493
27 11438396227480

List of values

[2, 5, 13, 40, 121, 365, 1094, 3281, 9841, 29524, 88573, 265721, 797162, 2391485, 7174453, 21523360, 64570081, 193710245, 581130734, 1743392201, 5230176601, 15690529804, 47071589413, 141214768241, 423644304722, 1270932914165, 3812798742493, 11438396227480]