A215787 - cp's OEIS frontend

A215787 Number of permutations of 0..floor((n*9-1)/2) on even squares of an nX9 array such that each row, column, diagonal and (downwards) antidiagonal of even squares is increasing.

n	a(n)
1	1
2	14
3	462
4	11694
5	530429
6	14296434
7	673507749
8	18255280444
9	862827082115
10	23397688110992
11	1106178923600669
12	29997930933948284
13	1418251919293188195
14	38461009542931961924
15	1818375422885354065137
16	49311812528326463481148

[1, 14, 462, 11694, 530429, 14296434, 673507749, 18255280444, 862827082115, 23397688110992, 1106178923600669, 29997930933948284, 1418251919293188195, 38461009542931961924, 1818375422885354065137, 49311812528326463481148]

cp's OEIS Frontend

A215787 Number of permutations of 0..floor((n*9-1)/2) on even squares of an nX9 array such that each row, column, diagonal and (downwards) antidiagonal of even squares is increasing.

Table of values

List of values