A251248 Number of (n+1)X(7+1) 0..2 arrays with no 2X2 subblock having the sum of its diagonal elements less than the minimum of its antidiagonal elements.

24095475, 91345992921, 345878548314469, 1309640978922956217, 4958824382557190011939, 18776074467676820865893649, 71093648993125363900542904561, 269188685349250291174788288004161

Offset: 1

Author

R. H. Hardin, Dec 01 2014

Keywords

• nonn

Comments

Column 7 of A251249

Examples

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

Links

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