A195217 Number of lower triangles of an n X n integer array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by 5 or less and triangles differing by a constant counted only once

1, 91, 51205, 189677411, 4677360495205, 774355028021195459, 863969905606597340602967, 6512935591253221256126051469607

Offset

1,2

Comments

Column 5 of A195220

Links

Table of n, a(n) for n=1..8.

Example

Some solutions for n=5
...0...............0...............0...............0...............0
...3..3............2.-2...........-1.-2...........-3..0............4..1
...2..0..4.........0..3.-1.........1..3.-1.........0..2..3.........6..2..5
..-2..0..2..1......1.-2.-1.-5......5..2..2.-2.....-3.-2.-2.-1......3..5..6..8
...0..3..0.-1..3...0.-1.-5..0.-3...3..1.-2.-3..2...1..0..0.-1.-3...6..5..6..3..3

Crossrefs

Sequence in context: A157802 A214110 A119130 * A352755 A116677 A323060

Adjacent sequences: A195214 A195215 A195216 * A195218 A195219 A195220

Keyword

nonn

Author

R. H. Hardin Sep 13 2011

Status

approved