A195276 Number of lower triangles of an n X n integer array with each element differing from all of its vertical and horizontal neighbors by 6 or less and triangles differing by a constant counted only once.
1, 169, 248261, 3249312469, 383752106451389, 411207789366962687359, 4011033701337366560359871745
Offset: 1
Keywords
Examples
Some solutions for n=5 ...0...............0...............0...............0...............0 ..-6.-1...........-1..3...........-3.-8............3..9...........-2.-7 .-10.-6.-8........-6.-1..3.........1.-5.-8........-1..5..5.........1.-1.-7 .-15-10.-6.-9.....-9.-4.-2.-2......2..1.-2..2......3..7..4..2......1..0.-1..2 .-17-14-12.-9.-8.-10.-8.-4.-2..3...2..4.-1.-4.-6...1..6..4..5..0...5.-1.-7.-2..4
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