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.

A209200 G.f.: (1-4*x)^(-1/2) * (1-8*x)^(-1/4).

Table of values

n a(n)
0 1
1 4
2 20
3 112
4 680
5 4384
6 29536
7 205440
8 1462368
9 10587520
10 77633920
11 574845440
12 4289409280
13 32206976000
14 243074083840
15 1842511532032
16 14018197145088
17 106996519311360
18 818973463721984
19 6284217844736000
20 48327723087278080
21 372397083591557120

List of values

[1, 4, 20, 112, 680, 4384, 29536, 205440, 1462368, 10587520, 77633920, 574845440, 4289409280, 32206976000, 243074083840, 1842511532032, 14018197145088, 106996519311360, 818973463721984, 6284217844736000, 48327723087278080, 372397083591557120]