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A240042 Number of nX3 0..3 arrays with no element equal to zero plus the sum of elements to its left or zero plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4.

%I A240042 #6 Jun 02 2025 09:38:55
%S A240042 4,9,26,93,309,1043,3597,12865,45491,163686,584594,2103512,7548847,
%T A240042 27174662,97768996,352008043,1267200666,4563053012,16431815183,
%U A240042 59173883901,213095423135,767419010967,2763770574117,9953309109574
%N A240042 Number of nX3 0..3 arrays with no element equal to zero plus the sum of elements to its left or zero plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4.
%C A240042 Column 3 of A240046
%H A240042 R. H. Hardin, <a href="/A240042/b240042.txt">Table of n, a(n) for n = 1..210</a>
%e A240042 Some solutions for n=3
%e A240042 ..2..3..2....3..2..3....2..3..3....2..3..3....3..2..2....3..2..2....3..2..2
%e A240042 ..1..0..0....2..1..0....3..1..2....3..1..2....1..0..3....2..1..0....2..0..3
%e A240042 ..1..2..0....3..0..2....3..1..2....2..1..2....1..3..2....2..0..3....2..1..2
%K A240042 nonn
%O A240042 1,1
%A A240042 _R. H. Hardin_, Mar 31 2014