A251800 Number of (n+1)X(7+1) 0..3 arrays with no 2X2 subblock having x11-x00 less than x10-x01.

4206453, 1271711747, 413630526506, 145329837643171, 52256028323545001, 19010586449609604592, 6950854990205965398511, 2548249927405969316226847, 935397563567598908162444188, 343605100623054019565873475859

Offset: 1

Author

R. H. Hardin, Dec 09 2014

Keywords

• nonn

Comments

Column 7 of A251801

Examples

			Some solutions for n=1
..0..0..2..2..0..0..1..3....0..0..0..1..1..3..3..3....0..0..0..0..0..0..2..0
..0..2..0..0..2..2..3..1....0..0..2..2..2..0..3..3....0..0..0..0..3..3..1..3
		

Links

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