A225980 Number of nX6 binary arrays whose sum with another nX6 binary array containing no more than two 1s has rows and columns in lexicographically nondecreasing order.

42, 790, 16361, 361361, 7718077, 148890101, 2513743785, 36836074434, 470279869497, 5279223820491, 52686610737385, 472630223607623, 3849896640784837, 28735919289705656, 198113452132002555

Offset: 1

Author

R. H. Hardin May 22 2013

Keywords

• nonn

Comments

Column 6 of A225982

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..29