cp's OEIS Frontend

A241308 Number of 3Xn 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 zero plus the sum of the elements antidiagonally to its northeast, modulo 4.

%I A241308 #6 Jun 02 2025 10:05:21
%S A241308 11,6,37,74,186,646,1278,3418,9113,21457,60124,137479,352570,903787,
%T A241308 2152775,5701225,13891880,34569079,88272180,217502063,550658503,
%U A241308 1377693048,3441000964,8635401747,21620210682,54285004854,135701054466
%N A241308 Number of 3Xn 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 zero plus the sum of the elements antidiagonally to its northeast, modulo 4.
%C A241308 Row 3 of A241306
%H A241308 R. H. Hardin, <a href="/A241308/b241308.txt">Table of n, a(n) for n = 1..183</a>
%e A241308 Some solutions for n=4
%e A241308 ..3..2..3..2....3..2..3..2....3..2..3..2....3..2..3..3....3..2..3..2
%e A241308 ..3..0..1..1....1..2..1..1....1..0..3..2....3..0..1..1....3..0..1..1
%e A241308 ..2..0..0..1....3..2..3..2....2..0..0..3....2..1..0..2....1..2..0..2
%K A241308 nonn
%O A241308 1,1
%A A241308 _R. H. Hardin_, Apr 18 2014