A195214 - OEIS

A195214

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 2 or less and triangles differing by a constant counted only once

1, 19, 1047, 176471, 92031109, 149824887097, 764465228592699, 12257873230432791803, 618761146282316127586145, 98449515559059678433241253935, 49416410864494101822050533251357921

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Column 2 of A195220

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..12

EXAMPLE

Some solutions for n=5

...0...............0...............0...............0...............0

...2..1...........-2.-1............1..0............0..1............0..1

...0..2..2.........0..0.-1.........0..2..2........-1..1..3.........1..0..0