A238254 Number of (n+1)X(7+1) 0..1 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise.

3249, 90225, 7616082, 640472606, 64353451945, 5017308028639, 395035485087390, 24520763755992781, 1504227932142140703, 75758809125961889230

Offset: 1

Author

R. H. Hardin, Feb 21 2014

Keywords

• nonn

Comments

Column 7 of A238255

Examples

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