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A195247
Number of lower triangles of an n X n 0..7 array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by two or less
0
8, 122, 5870, 886084, 421064386, 631149414120, 2987571816007840, 44691981426014450274, 2113939963847059814381026, 316271939439306387096992492956, 149706956331711946010383809151524932
OFFSET
1,1
COMMENTS
Column 7 of A195248
EXAMPLE
Some solutions for n=5
..0..........1..........6..........0..........7..........4..........4
..1.2........3.3........5.5........0.2........5.6........4.6........6.6
..2.1.1......2.1.3......6.6.7......1.1.2......4.6.7......5.5.4......5.4.5
..0.0.2.2....3.3.3.4....7.7.7.6....2.0.1.0....5.5.7.5....7.6.6.4....4.4.3.4
..0.1.0.1.1..2.3.3.2.2..7.7.7.6.4..1.0.2.0.2..4.5.7.7.5..6.6.5.4.3..4.3.2.3.2
CROSSREFS
Sequence in context: A359355 A349525 A240477 * A239755 A264408 A364985
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 13 2011
STATUS
approved