A251061 Number of (n+1)X(4+1) 0..2 arrays with no 2X2 subblock having x11-x00 less than x10-x01.

3123, 89429, 2482824, 71431719, 2062530658, 59730054958, 1731036678270, 50188065312931, 1455292342943790, 42201961348177580, 1223840515308222344, 35491430464043617892, 1029257212053833200296, 29848718048671125722468

Offset: 1

Author

R. H. Hardin, Nov 29 2014

Keywords

• nonn

Comments

Column 4 of A251065

Examples

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

Links

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