|
%I #7 Jan 27 2013 02:36:45
%S 6229504,188814612,5699887192,156721188699,2571152951156
%N Number of (n+2)X9 binary arrays with 3X3 subblock sums nondecreasing rightwards and downwards.
%C Column 7 of A186840
%e Some solutions for 4X9
%e ..0..0..0..0..0..0..0..1..0....0..0..0..0..0..1..0..0..1
%e ..0..0..0..0..0..1..0..0..1....0..0..0..0..0..0..0..1..1
%e ..0..0..0..0..0..0..0..1..0....0..0..0..0..0..0..0..0..1
%e ..0..0..0..0..1..0..1..1..0....0..0..1..0..1..1..1..1..0
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 27 2011
| 