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.

A106666 Expansion of g.f. (1-4*x^2+2*x^3)/((1-x)*(1-2*x-2*x^2+2*x^3)).

Table of values

n a(n)
0 1
1 3
2 5
3 13
4 29
5 73
6 177
7 441
8 1089
9 2705
10 6705
11 16641
12 41281
13 102433
14 254145
15 630593
16 1564609
17 3882113
18 9632257
19 23899521
20 59299329
21 147133185
22 365065985
23 905799681
24 2247464961
25 5576397313
26 13836125185
27 34330115073
28 85179685889

List of values

[1, 3, 5, 13, 29, 73, 177, 441, 1089, 2705, 6705, 16641, 41281, 102433, 254145, 630593, 1564609, 3882113, 9632257, 23899521, 59299329, 147133185, 365065985, 905799681, 2247464961, 5576397313, 13836125185, 34330115073, 85179685889]