cp's OEIS Frontend

A241287 Number of 5Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of the elements above it or one 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 A241287 #6 Jun 02 2025 10:04:08
%S A241287 56,139,1615,6783,20717,451318,1543713,8288114,79113707,276340333,
%T A241287 1878731208,14642190232,59010752583,404841299508,2875913561864,
%U A241287 13757588225177,90753330244908,606550462257317,3111205949073436
%N A241287 Number of 5Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of the elements above it or one 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 A241287 Row 5 of A241283
%H A241287 R. H. Hardin, <a href="/A241287/b241287.txt">Table of n, a(n) for n = 1..20</a>
%e A241287 Some solutions for n=3
%e A241287 ..3..2..3....3..2..3....3..2..3....3..2..3....3..2..3....3..2..3....3..2..3
%e A241287 ..0..3..2....2..1..2....2..1..2....0..3..2....2..1..2....0..3..2....2..1..2
%e A241287 ..0..0..2....0..2..0....0..0..0....2..0..0....2..0..2....2..2..0....0..0..3
%e A241287 ..2..2..0....0..0..0....0..2..0....0..0..3....0..0..0....2..0..0....2..2..2
%e A241287 ..2..0..2....0..0..2....2..0..2....2..2..2....0..0..2....2..2..2....0..0..0
%K A241287 nonn
%O A241287 1,1
%A A241287 _R. H. Hardin_, Apr 18 2014