A215286 - cp's OEIS frontend

A215286 Number of permutations of 0..floor((n*n-1)/2) on even squares of an n X n array such that each row and column of even squares is increasing.

n	a(n)
1	1
2	2
3	10
4	280
5	60060
6	85765680
7	2061378118800
8	346915095471584640
9	1736278161426147413954880
10	62144711688730139887005809020800
11	103104526145243794108489566205445861006400

[1, 2, 10, 280, 60060, 85765680, 2061378118800, 346915095471584640, 1736278161426147413954880, 62144711688730139887005809020800, 103104526145243794108489566205445861006400]

cp's OEIS Frontend

A215286 Number of permutations of 0..floor((n*n-1)/2) on even squares of an n X n array such that each row and column of even squares is increasing.

Table of values

List of values