A195246 Number of lower triangles of an n X n 0..6 array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by two or less.

7, 103, 4823, 709613, 329060365, 481573562101, 2226347741716207, 32533092875899015419, 1503300467938958707014579, 219724247440207348239797551059, 101603289677502667519178169906161081

Offset: 1

Author

R. H. Hardin Sep 13 2011

Keywords

• nonn

Comments

Column 6 of A195248

Examples

			Some solutions for n=5
..2..........0..........4..........4..........2..........4..........1
..4.4........2.2........3.5........4.6........1.3........3.2........0.1
..5.6.4......4.4.3......4.5.4......5.6.6......1.3.2......4.3.1......0.2.1
..4.6.6.6....2.2.4.4....3.3.4.4....6.6.6.4....2.2.1.0....2.2.2.3....0.1.0.0
..4.6.5.5.6..4.4.3.4.3..3.2.3.4.2..5.4.5.6.6..0.2.0.1.2..0.1.1.3.1..1.2.2.0.1