A215785 - cp's OEIS frontend

A215785 Number of permutations of 0..floor((n*7-1)/2) on even squares of an n X 7 array such that each row, column, diagonal and (downwards) antidiagonal of even squares is increasing.

n	a(n)
1	1
2	5
3	42
4	262
5	2465
6	15485
7	146205
8	918637
9	8674386
10	54503318
11	514658321
12	3233726365
13	30535100957
14	191859642509
15	1811672635826
16	11383190276278
17	107488026474001
18	675374034791837
19	6377352953765373
20	40070496565665517

[1, 5, 42, 262, 2465, 15485, 146205, 918637, 8674386, 54503318, 514658321, 3233726365, 30535100957, 191859642509, 1811672635826, 11383190276278, 107488026474001, 675374034791837, 6377352953765373, 40070496565665517]

cp's OEIS Frontend

A215785 Number of permutations of 0..floor((n*7-1)/2) on even squares of an n X 7 array such that each row, column, diagonal and (downwards) antidiagonal of even squares is increasing.

Table of values

List of values