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.

A052722 Expansion of e.g.f. (1 - 2*x - sqrt(1-4*x))^2 * (1 - sqrt(1-4*x))/8.

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 0
5 120
6 3600
7 100800
8 3024000
9 99792000
10 3632428800
11 145297152000
12 6351561216000
13 301699157760000
14 15487223431680000
15 854894733428736000
16 50516506975334400000
17 3182539939446067200000
18 212985365178313728000000

List of values

[0, 0, 0, 0, 0, 120, 3600, 100800, 3024000, 99792000, 3632428800, 145297152000, 6351561216000, 301699157760000, 15487223431680000, 854894733428736000, 50516506975334400000, 3182539939446067200000, 212985365178313728000000]