A204715 - OEIS

%I #6 Mar 31 2012 12:37:03

%S 16,261,9657,727255,118449078,41246881735,31109609768113,

%T 51738130203845519,188875848685544442507,1543222842240805350432703,

%U 28017029132033699472678460753,1145483791106793200438759541860992

%N Number of (n+1)X(n+1) 0..1 arrays with the permanents of 2X2 subblocks nondecreasing rightwards and downwards

%C Diagonal of A204723

%H R. H. Hardin, <a href="/A204715/b204715.txt">Table of n, a(n) for n = 1..13</a>

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 18 2012