%I #5 Mar 30 2013 04:53:56
%S 2,1,4,4,16,19,76,98
%N Sequence h_n arising in enumeration of arrays of directed blocks (see Quaintance reference for precise definition).
%D Jocelyn Quaintance, Combinatoric Enumeration of Two-Dimensional Proper Arrays, Discrete Math., 307 (2007), 1844-1864.
%F See Quaintance reference for generating functions that produce A129872-A129886.
%K nonn,more
%O 1,1
%A _N. J. A. Sloane_, May 26 2007