%I A049980
%S A049980 1,1,2,2,3,4,4,4,7,6,6,9,7,8,13,9,9,15,10,12,18,13,12,20,15,15,23,17,
%T A049980 15,28,16,18,28,20,22,33,19,22,33,26,21,39,22,26,43,27,24,43,27,33,44,
%U A049980 31,27,50,34,34,49,34,30,60,31,36,57,38,40
%N A049980 a(n)=number of arithmetic progressions of positive integers, strictly 
               increasing with sum n.
%Y A049980 Sequence in context: A104351 A070172 A130128 this_sequence A141525 A071475 
               A112778
%Y A049980 Adjacent sequences: A049977 A049978 A049979 this_sequence A049981 A049982 
               A049983
%K A049980 nonn
%O A049980 1,3
%A A049980 Clark Kimberling (ck6(AT)evansville.edu)