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A241438 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 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 A241438 #6 Jun 02 2025 10:09:11
%S A241438 7,3,97,515,1563,5915,22712,76145,270960,1073158,3818620,13721807,
%T A241438 51728838,187790119,699951598,2604140270,9348611449,35299653581,
%U A241438 130303556135,471759570058,1773938926867,6503523325619,23881500761462
%N A241438 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 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 A241438 Row 4 of A241435
%H A241438 R. H. Hardin, <a href="/A241438/b241438.txt">Table of n, a(n) for n = 1..139</a>
%e A241438 Some solutions for n=4
%e A241438 ..2..2..3..2....3..3..2..2....3..3..2..2....2..2..3..2....3..2..3..3
%e A241438 ..2..1..1..2....2..2..0..0....3..2..0..0....2..1..1..2....2..1..3..2
%e A241438 ..3..3..0..0....3..1..2..0....2..1..2..0....3..3..2..2....3..1..2..0
%e A241438 ..2..1..3..0....2..0..2..2....2..1..3..2....2..2..0..0....2..0..2..0
%K A241438 nonn
%O A241438 1,1
%A A241438 _R. H. Hardin_, Apr 22 2014