cp's OEIS Frontend

A241431 Number of nX4 0..3 arrays with no element equal to one plus the sum of elements to its left or one 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 A241431 #6 Jun 02 2025 10:08:30
%S A241431 7,21,74,515,1527,5304,20690,61348,257119,920918,3090540,12030044,
%T A241431 40508800,149637207,549347596,1879652737,7032173983,24856568624,
%U A241431 88496458840,325227255990,1142461364583,4148471540343,14938347230115
%N A241431 Number of nX4 0..3 arrays with no element equal to one plus the sum of elements to its left or one 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 A241431 Column 4 of A241435
%H A241431 R. H. Hardin, <a href="/A241431/b241431.txt">Table of n, a(n) for n = 1..210</a>
%e A241431 Some solutions for n=4
%e A241431 ..2..2..3..2....2..2..3..2....2..2..3..2....2..2..3..2....2..2..2..2
%e A241431 ..2..1..1..0....2..1..1..2....2..1..1..0....2..1..1..0....2..1..1..0
%e A241431 ..3..3..2..2....3..1..0..0....3..1..2..2....3..1..2..0....3..1..2..0
%e A241431 ..2..0..0..2....3..2..0..0....3..2..1..2....2..0..2..2....2..0..0..2
%K A241431 nonn
%O A241431 1,1
%A A241431 _R. H. Hardin_, Apr 22 2014