cp's OEIS Frontend

A241285 Number of 3Xn 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 A241285 #6 Jun 02 2025 10:03:54
%S A241285 10,9,41,126,224,934,2741,5225,20537,55667,113588,422541,1125360,
%T A241285 2473769,8840311,23068806,53641026,184488860,476641936,1157699906,
%U A241285 3848451987,9887622772,24862454468,80220253420,205811182949,531847795781
%N A241285 Number of 3Xn 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 A241285 Row 3 of A241283
%H A241285 R. H. Hardin, <a href="/A241285/b241285.txt">Table of n, a(n) for n = 1..170</a>
%e A241285 Some solutions for n=4
%e A241285 ..3..3..2..2....3..3..2..3....3..3..2..3....3..2..3..3....3..3..2..3
%e A241285 ..2..1..1..0....2..1..3..0....2..1..3..0....2..1..1..2....2..1..1..2
%e A241285 ..2..2..0..0....3..1..3..2....3..1..0..0....2..0..2..2....3..2..0..3
%K A241285 nonn
%O A241285 1,1
%A A241285 _R. H. Hardin_, Apr 18 2014