%I A058259
%S A058259 1,2,5,16,61,279,1491,9267,66447,545173
%N A058259 Number of split semiorders on n points.
%D A058259 P. C. Fishburn and J. A. Reeds, Counting split semiorders, Order, 18(2): 
               119-128, 2001.
%Y A058259 Cf. A000111, A058260.
%Y A058259 Sequence in context: A000111 A163747 A007976 this_sequence A033543 A124531 
               A129578
%Y A058259 Adjacent sequences: A058256 A058257 A058258 this_sequence A058260 A058261 
               A058262
%K A058259 nonn,hard,nice
%O A058259 1,2
%A A058259 N. J. A. Sloane (njas(AT)research.att.com), Dec 06 2000