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A241400 Number of 4Xn 0..3 arrays with no element equal to zero 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 A241400 #6 Jun 02 2025 10:07:56
%S A241400 7,28,97,480,1657,8697,31654,92204,397955,1440202,5015494,20114505,
%T A241400 70074714,258768285,999131434,3471187281,13084431710,49495338616,
%U A241400 176036491899,662243630484,2450968267032,8911921597230,33375847400152
%N A241400 Number of 4Xn 0..3 arrays with no element equal to zero 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 A241400 Row 4 of A241397
%H A241400 R. H. Hardin, <a href="/A241400/b241400.txt">Table of n, a(n) for n = 1..136</a>
%e A241400 Some solutions for n=4
%e A241400 ..2..3..3..2....2..3..3..2....2..3..3..3....3..2..2..2....3..2..2..2
%e A241400 ..1..3..1..2....1..3..1..2....1..3..1..2....1..2..0..0....1..2..0..0
%e A241400 ..1..2..2..2....1..2..0..2....2..0..0..3....2..0..0..0....3..0..0..0
%e A241400 ..3..0..0..2....3..2..2..2....3..0..2..2....2..3..0..2....1..2..0..0
%K A241400 nonn
%O A241400 1,1
%A A241400 _R. H. Hardin_, Apr 20 2014