A203561 Number of nX5 0..2 arrays with row sums equal and column sums equal.

3, 53, 993, 32613, 2577513, 39612503, 1509893003, 59794281893, 2435292751413, 165459828692703, 4307041366439903, 185658731463324903, 8107975032968711943, 358060848206529563813, 21242986806159652173693, 717973394997481520889893

Offset: 1

Author

R. H. Hardin Jan 03 2012

Keywords

• nonn

Comments

Column 5 of A203564

Examples

			Some solutions for n=5
..1..2..2..0..0....1..0..1..1..1....2..2..0..2..1....1..1..2..2..2
..0..0..2..2..1....2..0..0..2..0....0..2..1..2..2....1..2..1..2..2
..1..0..0..2..2....0..2..1..0..1....1..2..2..2..0....2..1..2..1..2
..1..1..0..1..2....0..2..2..0..0....2..0..2..1..2....2..2..1..2..1
..2..2..1..0..0....1..0..0..1..2....2..1..2..0..2....2..2..2..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..19