A215867 - cp's OEIS frontend

A215867 Number of permutations of 0..floor((n*7-2)/2) on odd squares of an n X 7 array such that each row, column, diagonal and (downwards) antidiagonal of odd squares is increasing.

n	a(n)
1	1
2	5
3	29
4	262
5	1642
6	15485
7	97289
8	918637
9	5772013
10	54503318
11	342457898
12	3233726365
13	20318307913
14	191859642509
15	1205501906765
16	11383190276278
17	71523418913482
18	675374034791837
19	4243543228336841
20	40070496565665517

[1, 5, 29, 262, 1642, 15485, 97289, 918637, 5772013, 54503318, 342457898, 3233726365, 20318307913, 191859642509, 1205501906765, 11383190276278, 71523418913482, 675374034791837, 4243543228336841, 40070496565665517]

cp's OEIS Frontend

A215867 Number of permutations of 0..floor((n*7-2)/2) on odd squares of an n X 7 array such that each row, column, diagonal and (downwards) antidiagonal of odd squares is increasing.

Table of values

List of values