A194611 Half the number of lower triangles of an (n+1) X (n+1) 0..4 array with no element equal to the average of its horizontal and vertical neighbors.

36, 3638, 1674043, 3703163910, 38969955227338, 1946585305112431165, 461761593540314858209528, 520265339158575595235640177020

Offset: 1

Author

R. H. Hardin, Aug 30 2011

Keywords

• nonn
• more

Examples

			Some solutions for 3X3
..3......2......2......0......1......4......4......3......1......3......1
..0.4....0.3....4.2....3.1....2.2....0.1....1.1....4.0....2.3....1.0....4.4
..1.3.1..4.0.3..4.2.1..4.1.4..2.3.1..0.3.0..4.2.3..3.1.4..0.1.2..1.3.2..2.3.0
		

Crossrefs

Column 4 of A194615.