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A240156 Number of 4Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.

%I A240156 #6 Jun 02 2025 09:41:06
%S A240156 7,25,67,676,1328,5701,24419,52676,243555,876504,2400051,10681824,
%T A240156 37465330,108284648,460964686,1527396439,4792821890,19591078862,
%U A240156 63187977557,212419410767,830175708307,2671224202187,9338356637595
%N A240156 Number of 4Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.
%C A240156 Row 4 of A240153
%H A240156 R. H. Hardin, <a href="/A240156/b240156.txt">Table of n, a(n) for n = 1..155</a>
%e A240156 Some solutions for n=4
%e A240156 ..2..2..3..3....2..2..3..2....2..2..3..3....2..2..3..2....2..2..3..2
%e A240156 ..0..0..2..2....0..2..1..2....0..2..1..3....0..2..1..1....0..2..1..1
%e A240156 ..0..2..1..3....0..0..0..3....2..2..2..1....0..0..2..1....0..0..3..3
%e A240156 ..0..2..0..2....0..0..0..2....0..2..0..1....2..0..0..2....0..2..2..2
%K A240156 nonn
%O A240156 1,1
%A A240156 _R. H. Hardin_, Apr 02 2014