|
%I #7 Mar 31 2012 12:35:53
%S 19,87,355,1383,5299,20247,77635,299463,1162579,4540407
%N Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock summing to 4
%C Diagonal of A183632
%e Some solutions for 3X3
%e ..1..2..0....0..2..0....1..2..0....2..0..1....1..1..0....0..1..0....0..1..1
%e ..0..1..1....2..0..2....1..0..2....0..2..1....0..2..1....1..2..1....2..1..1
%e ..2..1..1....1..1..1....2..1..1....2..0..1....1..1..0....0..1..0....1..0..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 06 2011
| 