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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
0
7, 103, 4823, 709613, 329060365, 481573562101, 2226347741716207, 32533092875899015419, 1503300467938958707014579, 219724247440207348239797551059, 101603289677502667519178169906161081
OFFSET
1,1
COMMENTS
Column 6 of A195248
EXAMPLE
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
CROSSREFS
Sequence in context: A101746 A318398 A318815 * A280644 A322646 A224706
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 13 2011
STATUS
approved