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.

A061703 G.f.: 2*x*(2-2*x-3*x^2+2*x^3)/((1-3*x-x^2+x^3)*(1-x)).

Table of values

n a(n)
0 0
1 4
2 12
3 34
4 108
5 344
6 1104
7 3546
8 11396
9 36628
10 117732
11 378426
12 1216380
13 3909832
14 12567448
15 40395794
16 129844996
17 417363332
18 1341539196
19 4312135922
20 13860583628
21 44552347608
22 143205490528
23 460308235562
24 1479577849604

List of values

[0, 4, 12, 34, 108, 344, 1104, 3546, 11396, 36628, 117732, 378426, 1216380, 3909832, 12567448, 40395794, 129844996, 417363332, 1341539196, 4312135922, 13860583628, 44552347608, 143205490528, 460308235562, 1479577849604]