A209677 Number of n X n 0..n arrays with every element equal to a diagonal or antidiagonal reflection, and new values 0 upwards introduced in row major order.

1, 14, 1243, 6716352, 268997909000, 1568091719977974635, 70570762532647014868797563, 841333288100321854075145135825724005, 79538689762318826508394939059605661254128283987

Offset: 1

Author

R. H. Hardin Mar 11 2012

Keywords

• nonn

Comments

Diagonal of A209684

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..34