cp's OEIS Frontend

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.

%I A195276 #7 Jul 22 2025 12:43:33
%S A195276 1,169,248261,3249312469,383752106451389,411207789366962687359,
%T A195276 4011033701337366560359871745
%N 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.
%C A195276 Column 6 of A195278
%e A195276 Some solutions for n=5
%e A195276 ...0...............0...............0...............0...............0
%e A195276 ..-6.-1...........-1..3...........-3.-8............3..9...........-2.-7
%e A195276 .-10.-6.-8........-6.-1..3.........1.-5.-8........-1..5..5.........1.-1.-7
%e A195276 .-15-10.-6.-9.....-9.-4.-2.-2......2..1.-2..2......3..7..4..2......1..0.-1..2
%e A195276 .-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
%K A195276 nonn
%O A195276 1,2
%A A195276 _R. H. Hardin_ Sep 14 2011