A194501 Number of lower triangles of an n X n 0..4 array with each element unequal to the sum mod 5 of its horizontal and vertical neighbors.

4, 64, 4160, 1048560, 1073741824, 4398046511104, 72057594037927936

Offset: 1

Author

R. H. Hardin Aug 27 2011

Keywords

• nonn

Comments

Column 4 of A194505

Examples

			Some solutions for 3X3
..0......1......3......1......0......1......2......2......4......1......0
..2.0....0.3....2.4....0.2....1.0....4.0....4.2....0.4....2.3....2.2....3.4
..4.1.4..2.4.0..1.1.4..1.4.2..0.3.1..0.0.2..3.1.2..2.0.1..3.4.0..3.3.4..3.2.4