%I #7 May 02 2021 17:59:45

%S 7,88,281,1859,13246,63807,397689,2438053,13469845,81119250,479643334,

%T 2766405526,16398672521,96270399637,562412130699,3312658458361,

%U 19432125660759,113930244019306,669493281487815,3928178034671452

%N Number of n X 3 0..3 arrays with every element equal to either the sum mod 4 of its vertical neighbors or the sum mod 4 of its horizontal neighbors.

%C Column 3 of A183492.

%H R. H. Hardin, <a href="/A183486/b183486.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for 5 X 3

%e ..0..2..2....0..0..0....0..2..2....3..1..2....2..2..3....2..1..1....0..3..2

%e ..0..0..0....0..0..0....0..0..0....3..1..2....2..2..3....2..1..1....0..3..2

%e ..0..0..0....0..1..1....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0

%e ..1..1..0....0..2..2....1..3..3....0..0..0....3..0..1....1..3..1....2..0..2

%e ..3..3..0....0..1..1....1..3..3....2..2..0....3..0..1....1..3..1....2..0..2

%Y Cf. A183492.

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 05 2011