%I A049986
%S A049986 0,0,0,0,0,0,0,0,0,1,0,0,0,1,1,1,0,1,0,2,1,2,0,1,2,2,1,3,0,4,0,2,1,3,4,
%T A049986 4,0,3,1,6,0,5,0,4,6,4,0,4,2,8,2,5,0,6,6,6,2,5,0,11,0,5,5,6,7,8,0,6,2,
%U A049986 15,0,9,0,6,10,7,4,9,0,14,5,7,0,12,9,7,3
%N A049986 a(n)=number of arithmetic progressions of 4 or more positive integers, 
               strictly increasing with sum n.
%Y A049986 Sequence in context: A115628 A114002 A114004 this_sequence A137289 A063574 
               A144515
%Y A049986 Adjacent sequences: A049983 A049984 A049985 this_sequence A049987 A049988 
               A049989
%K A049986 nonn
%O A049986 1,20
%A A049986 Clark Kimberling (ck6(AT)evansville.edu)