cp's OEIS Frontend

A195225 Number of lower triangles of a 7X7 integer array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by n or less and triangles differing by a constant counted only once.

%I A195225 #14 Jul 22 2025 12:40:57
%S A195225 2021888119,764465228592699,5137554141710397313,
%T A195225 4059527861103273129317,863969905606597340602967,
%U A195225 76019997788404353762724447,3546881146489163009435488735,102667264655001518661047239817
%N A195225 Number of lower triangles of a 7X7 integer array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by n or less and triangles differing by a constant counted only once.
%C A195225 Row 7 of A195220
%C A195225 a(n) is an Ehrhart polynomial of degree 27. - _Robert Israel_, Oct 07 2019
%H A195225 R. H. Hardin, <a href="/A195225/b195225.txt">Table of n, a(n) for n = 1..9</a>
%e A195225 Some solutions for n=5
%e A195225 ...0.....................0.....................0
%e A195225 ...3..5..................5..0.................-3.-3
%e A195225 ...7..8..9...............5..3..2..............-2..0.-1
%e A195225 ...5..7..4..4............8..4.-1.-2...........-4.-4.-2..1
%e A195225 ...6..4..4.-1.-1.........3..3.-1..0.-4........-6.-1.-1.-3..1
%e A195225 ...1..4..2.-1..4..2......3..1.-2.-2.-3.-3.....-4.-4.-2.-4.-2..3
%e A195225 ...6..3..4..0..4..6..3...4..3..0..1.-1.-2.-1..-1..1.-3.-3.-2..0.-2
%K A195225 nonn
%O A195225 1,1
%A A195225 _R. H. Hardin_, Sep 13 2011