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.

A291417 p-INVERT of (1,1,0,0,0,0,...), where p(S) = 1 - 4 S + 2 S^2.

Table of values

n a(n)
0 4
1 18
2 76
3 322
4 1360
5 5744
6 24256
7 102428
8 432528
9 1826456
10 7712656
11 32568568
12 137528704
13 580748416
14 2452351488
15 10355650832
16 43729255232
17 184657419808
18 779760883392
19 3292730050592
20 13904353779456
21 58714516845824
22 247936332973056
23 1046971490364864

List of values

[4, 18, 76, 322, 1360, 5744, 24256, 102428, 432528, 1826456, 7712656, 32568568, 137528704, 580748416, 2452351488, 10355650832, 43729255232, 184657419808, 779760883392, 3292730050592, 13904353779456, 58714516845824, 247936332973056, 1046971490364864]