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.
8, 122, 5870, 886084, 421064386, 631149414120, 2987571816007840, 44691981426014450274, 2113939963847059814381026, 316271939439306387096992492956, 149706956331711946010383809151524932
Offset: 1
Keywords
Examples
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
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