%I A022016
%S A022016 1,1,4,12,47,174
%N A022016 Partially ordered sets with no isolated points by number of "lines": 
               pairs (a,b) where a < b and there is no c with a < c < b. The lines 
               form the minimal basis for the partial ordering.
%Y A022016 Cf. A000112, A022017.
%Y A022016 Sequence in context: A149374 A149375 A035310 this_sequence A151441 A032380 
               A057346
%Y A022016 Adjacent sequences: A022013 A022014 A022015 this_sequence A022017 A022018 
               A022019
%K A022016 nonn
%O A022016 0,3
%A A022016 Frank Adams-Watters (FrankTAW(AT)Netscape.net), Mar 30 2002