A194613 Half the number of lower triangles of an (n+1) X (n+1) 0..6 array with no element equal to the average of its horizontal and vertical neighbors.

117, 34247, 66369488, 873084601728, 77572756670578163, 46519509694797259637061

Offset: 1

Author

R. H. Hardin, Aug 30 2011

Keywords

• nonn

Examples

			Some solutions for 3X3
..3......6......3......1......3......5......1......4......1......4......6
..1.2....1.2....4.4....6.0....2.3....2.5....0.5....3.1....5.0....5.4....5.4
..2.0.6..1.4.5..3.5.2..0.5.1..1.3.0..2.4.1..6.0.2..2.4.5..5.6.4..6.6.4..0.1.2
		

Crossrefs

Column 6 of A194615.