A007946 - cp's OEIS frontend

A007946 a(n) = 6(2n+1)! / ((n!)^2*(n+3)).

n	a(n)
0	2
1	9
2	36
3	140
4	540
5	2079
6	8008
7	30888
8	119340
9	461890
10	1790712
11	6953544
12	27041560
13	105306075
14	410605200
15	1602881040
16	6263890380
17	24502865310
18	95937144600
19	375945078600
20	1474358525640
21	5786272150230
22	22724268808176
23	89301056353200
24	351140573438200
25	1381487341784004

[2, 9, 36, 140, 540, 2079, 8008, 30888, 119340, 461890, 1790712, 6953544, 27041560, 105306075, 410605200, 1602881040, 6263890380, 24502865310, 95937144600, 375945078600, 1474358525640, 5786272150230, 22724268808176, 89301056353200, 351140573438200, 1381487341784004]

cp's OEIS Frontend

A007946 a(n) = 6(2n+1)! / ((n!)^2*(n+3)).

Table of values

List of values

cp's OEIS Frontend

A007946 a(n) = 6*(2*n+1)! / ((n!)^2*(n+3)).

Table of values

List of values

A007946 a(n) = 6(2n+1)! / ((n!)^2*(n+3)).