A215288 - cp's OEIS frontend

A215288 Number of permutations of 0..floor((n*4-1)/2) on even squares of an n X 4 array such that each row and column of even squares is increasing.

n	a(n)
1	1
2	6
3	30
4	280
5	2100
6	23100
7	210210
8	2522520
9	25729704
10	325909584
11	3585005424
12	47117214144
13	546896235600
14	7383099180600
15	89212448432250
16	1229149289511000
17	15323394475903800
18	214527522662653200
19	2742051789669912720

[1, 6, 30, 280, 2100, 23100, 210210, 2522520, 25729704, 325909584, 3585005424, 47117214144, 546896235600, 7383099180600, 89212448432250, 1229149289511000, 15323394475903800, 214527522662653200, 2742051789669912720]

cp's OEIS Frontend

A215288 Number of permutations of 0..floor((n*4-1)/2) on even squares of an n X 4 array such that each row and column of even squares is increasing.

Table of values

List of values