A132912 - cp's OEIS frontend

A132912 a(n) = C(n+2,2)(2n)!/2^n.

n	a(n)
0	1
1	3
2	36
3	900
4	37800
5	2381400
6	209563200
7	24518894400
8	3677834160000
9	687754987920000
10	156808137245760000
11	42808621468092480000
12	13784376112725778560000
13	5169141042272166960000000
14	2233068930261576126720000000
15	1100902982618957030472960000000

[1, 3, 36, 900, 37800, 2381400, 209563200, 24518894400, 3677834160000, 687754987920000, 156808137245760000, 42808621468092480000, 13784376112725778560000, 5169141042272166960000000, 2233068930261576126720000000, 1100902982618957030472960000000]

cp's OEIS Frontend

A132912 a(n) = C(n+2,2)(2n)!/2^n.

Table of values

List of values

cp's OEIS Frontend

A132912 a(n) = C(n+2,2)*(2*n)!/2^n.

Table of values

List of values

A132912 a(n) = C(n+2,2)(2n)!/2^n.