A194500 Number of lower triangles of an n X n 0..3 array with each element unequal to the sum mod 4 of its horizontal and vertical neighbors.

3, 27, 776, 59052, 14348907, 10460353203, 22876792454961, 150094717239776832

Offset: 1

Author

R. H. Hardin Aug 27 2011

Keywords

• nonn

Comments

Column 3 of A194505

Examples

			Some solutions for 3X3
..0......1......1......1......2......1......3......2......2......1......1
..1.3....3.1....0.3....2.0....3.2....0.0....1.3....1.3....0.2....0.3....3.3
..1.1.3..2.0.2..1.2.3..3.0.2..1.1.3..2.3.0..1.1.2..2.0.1..2.3.1..3.2.3..0.3.1