%I A119868
%S A119868 1,6,21,44,124,158,382,558,899,1087,2022,2328,3936,4542,5463,6755,10366,
%T A119868 11306,16488,18315,21092,23455,32562,34901
%N A119868 Number of different values assumed by a/b+c/d as a,b,c,d range between 
               1 and n.
%e A119868 a(2)=6 since we can obtain 6 values, i.e., {1, 3/2, 2, 5/2, 3, 4}.
%t A119868 Table[Length@Union@Flatten@Table[a/b + c/d, {a,n}, {b,n}, {c,n}, {d,n}], 
               {n,24}]
%Y A119868 Cf. A119867.
%Y A119868 Sequence in context: A007339 A056237 A048036 this_sequence A081266 A087863 
               A051941
%Y A119868 Adjacent sequences: A119865 A119866 A119867 this_sequence A119869 A119870 
               A119871
%K A119868 nonn
%O A119868 1,2
%A A119868 Giovanni Resta (g.resta(AT)iit.cnr.it), May 26 2006