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.

A179191 Expansion of o.g.f. (1/2)*(-1 + 1/sqrt(1 - 4*x - 4*x^2)).

Table of values

n a(n)
0 0
1 1
2 4
3 16
4 68
5 296
6 1312
7 5888
8 26672
9 121696
10 558464
11 2574848
12 11917952
13 55345408
14 257741824
15 1203224576
16 5629027072
17 26383656448
18 123868321792
19 582414688256
20 2742116907008
21 12926036258816
22 60998951747584
23 288147689046016
24 1362407763795968
25 6447125560016896

List of values

[0, 1, 4, 16, 68, 296, 1312, 5888, 26672, 121696, 558464, 2574848, 11917952, 55345408, 257741824, 1203224576, 5629027072, 26383656448, 123868321792, 582414688256, 2742116907008, 12926036258816, 60998951747584, 288147689046016, 1362407763795968, 6447125560016896]