A262911 Number of (n+1)X(n+1) 0..1 arrays with each row divisible by 3 and each column divisible by 7, read as a binary number with top and left being the most significant bits.

1, 3, 15, 137, 18190, 1550557, 1282949605

Offset: 1

Author

R. H. Hardin, Oct 04 2015

Keywords

• nonn

Comments

Diagonal of A262917.

Examples

			Some solutions for n=4
..0..1..0..0..1....1..0..0..1..0....0..0..0..0..0....0..1..1..0..0
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
..0..1..1..1..1....1..1..1..1..0....0..1..1..1..1....0..1..1..0..0
..0..0..1..1..0....0..1..1..0..0....0..1..1..1..1....0..0..0..0..0
..0..1..1..1..1....1..1..1..1..0....0..1..1..1..1....0..1..1..0..0
		

Crossrefs

Cf. A262917.