A251267 Number of (n+1)X(7+1) 0..1 arrays with no 2X2 subblock having x11-x00 less than x10-x01.

1013, 8277, 73805, 715685, 7189937, 73607411, 760734085, 7901650053, 82288916360, 858174176431, 8956460879354, 93513621828339, 976584141141835, 10199930967838789, 106540252006060732, 1112874401391136229

Offset: 1

Author

R. H. Hardin, Dec 01 2014

Keywords

• nonn

Comments

Column 7 of A251268

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210