A226285 - cp's OEIS frontend

A226285 a(n) = [n/2]![(n+1)/2]!C([n/2],4)*C([(n+1)/2],4).

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	576
9	14400
10	360000
11	6480000
12	116640000
13	1905120000
14	31116960000
15	497871360000
16	7965941760000
17	129048256512000
18	2090581755494400
19	34843029258240000
20	580717154304000000
21	10038110810112000000
22	173515915431936000000
23	3123286477774848000000

[0, 0, 0, 0, 0, 0, 0, 576, 14400, 360000, 6480000, 116640000, 1905120000, 31116960000, 497871360000, 7965941760000, 129048256512000, 2090581755494400, 34843029258240000, 580717154304000000, 10038110810112000000, 173515915431936000000, 3123286477774848000000]

cp's OEIS Frontend

A226285 a(n) = [n/2]![(n+1)/2]!C([n/2],4)*C([(n+1)/2],4).

Table of values

List of values

cp's OEIS Frontend

A226285 a(n) = [n/2]!*[(n+1)/2]!*C([n/2],4)*C([(n+1)/2],4).

Table of values

List of values

A226285 a(n) = [n/2]![(n+1)/2]!C([n/2],4)*C([(n+1)/2],4).