cp's OEIS Frontend

A240274 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 one plus the sum of the elements diagonally to its northwest, modulo 4.

%I A240274 #6 Jun 02 2025 09:45:41
%S A240274 7,36,582,8265,126286,2059061,34514871,591083808,10257888481,
%T A240274 179492029479,3156570684216,55683928149753,984159273442563,
%U A240274 17414013354270353,308343982790239450,5462057581927992592
%N A240274 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 one plus the sum of the elements diagonally to its northwest, modulo 4.
%C A240274 Row 4 of A240271
%H A240274 R. H. Hardin, <a href="/A240274/b240274.txt">Table of n, a(n) for n = 1..210</a>
%e A240274 Some solutions for n=4
%e A240274 ..3..2..3..3....3..0..2..0....2..3..0..0....3..2..0..2....3..0..0..0
%e A240274 ..3..1..2..3....2..3..2..0....2..1..2..3....3..1..2..0....3..2..2..0
%e A240274 ..2..3..0..2....3..1..2..0....3..2..2..1....2..1..0..2....2..1..0..2
%e A240274 ..3..2..0..0....2..3..2..0....3..2..0..3....3..2..0..2....3..2..2..0
%K A240274 nonn
%O A240274 1,1
%A A240274 _R. H. Hardin_, Apr 03 2014