A209679 Number of n X n 0..4 arrays with every element equal to a diagonal or antidiagonal reflection, and new values 0 upwards introduced in row major order.

1, 15, 1243, 2143147, 6713848491, 336865786047147, 29579506766774446763, 41557077253870074781674155, 102173227506131465827954312522411, 4019288788864555869108044364449353214635

Offset: 1

Author

R. H. Hardin Mar 11 2012

Keywords

• nonn

Comments

Column 3 of A209684

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..51