A186870 - OEIS

%I #4 Mar 31 2012 12:36:06

%S 3645,285724,12048996,630235528,30995088416

%N Number of (n+1)X5 0..2 arrays with every 2X2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2X2 subblock sums

%C Column 4 of A186871

%e Some solutions for 3X5

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 27 2011