A194612 Half the number of lower triangles of an (n+1) X (n+1) 0..5 array with no element equal to the average of its horizontal and vertical neighbors.

69, 12438, 12561823, 73569838704, 2481372954501732, 481414314393133400117

Offset: 1

Author

R. H. Hardin, Aug 30 2011

Keywords

• nonn

Examples

			Some solutions for 3X3
..0......0......3......3......1......2......2......5......4......2......1
..2.0....4.3....0.0....0.3....4.4....5.0....1.0....1.1....0.2....1.2....0.5
..1.5.2..0.4.0..0.4.3..4.1.2..5.0.5..2.4.0..0.4.5..2.5.1..4.2.4..4.1.2..2.5.4
		

Crossrefs

Column 5 of A194615.