A251796 Number of (n+1)X(3+1) 0..3 arrays with no 2X2 subblock having x11-x00 less than x10-x01.

6627, 348679, 17195593, 873945739, 44356434596, 2255553135793, 114701510008550, 5833986692886877, 296731470002944944, 15092940450644308394, 767684502371802140711, 39047592997403421809265

Offset: 1

Author

R. H. Hardin, Dec 09 2014

Keywords

• nonn

Comments

Column 3 of A251801

Examples

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

Links

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