A072118 - cp's OEIS frontend

A072118 a(n) = (2*n)!/core(n!)^2/(n+1) where core(x) is the squarefree part of x.

n	a(n)
1	1
2	2
3	5
4	224
5	672
6	2737152
7	8895744
8	474439680
9	130660687872
10	4513732853760000
11	15798064988160000
12	894413525483520000
13	3194334019584000000
14	27610545531676262400000
15	8107146431738442547200000
16	7569213421444268241715200000
17	27753782545295650219622400000

[1, 2, 5, 224, 672, 2737152, 8895744, 474439680, 130660687872, 4513732853760000, 15798064988160000, 894413525483520000, 3194334019584000000, 27610545531676262400000, 8107146431738442547200000, 7569213421444268241715200000, 27753782545295650219622400000]

cp's OEIS Frontend

A072118 a(n) = (2*n)!/core(n!)^2/(n+1) where core(x) is the squarefree part of x.

Table of values

List of values