A195215 - OEIS

A195215

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

1, 37, 5453, 3395245, 9032683465, 103565705397639, 5137554141710397313, 1105495964728300359472149, 1033611648181176182212080096433, 4204060119607140359160709072654583501

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

OFFSET

1,2

COMMENTS

Column 3 of A195220

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=5

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

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

..-1.-2.-2.........2..1..3.........2.-1.-4.........1..2..4.........3..3..4