A209682 Number of n X n 0..7 arrays with every element equal to a diagonal or antidiagonal reflection, and new values 0 upwards introduced in row major order.

1, 15, 1551, 13575355, 584728215424, 1568091719977974635, 8230385298024619110939311, 2126394147054521999411737472214659, 1020701618427502395624813185662022237910866

Offset: 1

Author

R. H. Hardin Mar 11 2012

Keywords

• nonn

Comments

Column 6 of A209684

Examples

			Some solutions for n=3
..0..0..1....0..0..1....0..0..0....0..1..0....0..1..0....0..1..0....0..0..0
..2..0..0....0..1..1....0..1..2....2..1..1....1..0..2....2..1..1....1..1..0
..2..2..1....1..1..1....1..2..1....0..2..1....2..2..0....3..2..1....2..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..44