%I #5 Mar 31 2012 12:36:06
%S 361,24414,431016,12048996,270129432,6869877312,162868019530,
%T 4042781079474,97568985207226,2401857269073876,58373470048298950,
%U 1431967704538476946,34909706847661265062,854981421174931771662
%N Number of (n+1)X4 0..2 arrays with every 2X2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2X2 subblock sums
%C Column 3 of A186871
%H R. H. Hardin, <a href="/A186869/b186869.txt">Table of n, a(n) for n = 1..39</a>
%e Some solutions for 3X4
%e ..1..2..2..1....0..2..0..1....2..1..1..0....1..0..0..2....2..0..1..0
%e ..2..1..1..2....2..0..2..1....1..0..0..1....0..0..1..0....0..1..2..1
%e ..2..1..2..0....0..2..1..1....1..2..2..1....2..0..1..1....0..2..1..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 27 2011
