%I #6 Dec 18 2015 18:17:57
%S 1,1,23,592,27930,4984843,2482513429,3024912314764,10252037660298200,
%T 96894129507021776898,2459526431235740649572096,
%U 169397666939694686725348936336,31898632588336093438359543528177154
%N Number of n X n binary arrays with every 1 immediately preceded by 0 0 to the left or above
%C Diagonal of A203108
%e Some solutions for n=5
%e ..0..0..0..0..0....0..0..0..0..1....0..0..0..0..0....0..0..1..0..0
%e ..0..0..0..0..0....0..0..0..0..1....0..0..0..1..0....0..0..0..0..0
%e ..0..0..0..0..0....0..0..0..0..0....1..0..1..0..0....0..1..0..0..0
%e ..0..1..1..1..0....1..0..1..1..0....0..0..1..0..0....0..0..1..0..1
%e ..0..0..1..0..1....0..0..0..1..1....0..0..0..1..1....0..0..0..0..1
%K nonn
%O 1,3
%A _R. H. Hardin_ Dec 29 2011
|