cp's OEIS Frontend

A195277 Number of lower triangles of an n X n integer array with each element differing from all of its vertical and horizontal neighbors by 7 or less and triangles differing by a constant counted only once.

%I A195277 #7 Jul 22 2025 12:43:40
%S A195277 1,225,507375,11755976175,2834518121474625,7151051711514319493625,
%T A195277 189393562987102056163761489375
%N A195277 Number of lower triangles of an n X n integer array with each element differing from all of its vertical and horizontal neighbors by 7 or less and triangles differing by a constant counted only once.
%C A195277 Column 7 of A195278
%e A195277 Some solutions for n=5
%e A195277 ...0...............0...............0...............0...............0
%e A195277 ..-5.-7...........-1.-5...........-7.-7...........-1.-8............4..6
%e A195277 ..-8.-9.-8.........5..2..9........-7-14-17.........2.-4-11........-1.-1.-2
%e A195277 ..-1.-2.-3..1.....-1.-5..2..8.....-4.-7-14-10......1.-1.-5.-7......2..4..4.-3
%e A195277 ...5..3..3..5..6..-3.-2..5..9..6..-2.-5.-8-12-12..-1..4..0.-7-14...4..3..4.-3.-1
%K A195277 nonn
%O A195277 1,2
%A A195277 _R. H. Hardin_ Sep 14 2011