A227169 - cp's OEIS frontend

A227169 a(n) = 3((2n+2)!)^2 / (n!(n+1)!(n+2)!*(n+3)!).

n	a(n)
0	1
1	6
2	45
3	392
4	3780
5	39204
6	429429
7	4907760
8	58023108
9	705264040
10	8772399636
11	111263122656
12	1434941066000
13	18775651948200
14	248797110637125
15	3333772874210400
16	45115597383228900
17	615974564891763000
18	8477309210264363700
19	117511846058893572000

[1, 6, 45, 392, 3780, 39204, 429429, 4907760, 58023108, 705264040, 8772399636, 111263122656, 1434941066000, 18775651948200, 248797110637125, 3333772874210400, 45115597383228900, 615974564891763000, 8477309210264363700, 117511846058893572000]

cp's OEIS Frontend

A227169 a(n) = 3((2n+2)!)^2 / (n!(n+1)!(n+2)!*(n+3)!).

Table of values

List of values

cp's OEIS Frontend

A227169 a(n) = 3*((2*n+2)!)^2 / (n!*(n+1)!*(n+2)!*(n+3)!).

Table of values

List of values

A227169 a(n) = 3((2n+2)!)^2 / (n!(n+1)!(n+2)!*(n+3)!).