%I #5 Mar 31 2012 12:37:00
%S 16,164,2928,44366,969528,16895850,397550036,7576693894,184631622106,
%T 3777035543236,93707916130348,2028328695512904,50826307266520194
%N Number of (n+1)X(n+1) 0..1 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards
%C Diagonal of A204039
%e Some solutions for n=4
%e ..0..1..1..1..0....1..1..0..0..0....1..0..1..1..0....0..0..1..1..1
%e ..1..0..0..0..1....0..0..1..1..1....0..1..0..1..1....0..1..0..1..1
%e ..0..1..1..1..0....1..1..0..1..0....1..1..1..1..1....0..1..1..1..1
%e ..0..1..0..1..1....0..1..1..1..1....1..1..1..1..1....0..1..1..1..1
%e ..0..1..1..1..0....1..1..1..1..1....1..1..1..1..1....0..1..1..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 09 2012
|