%I A013940
%S A013940 0,0,0,1,1,1,1,2,3,3,3,4,4,4,4,5,5,6,6,7,7,7,7,8,9,9,10,
%T A013940 11,11,11,11,12,12,12,12,14,14,14,14,15,15,15,15,16,17,
%U A013940 17,17,18,19,20,20,21,21,22,22,23,23,23,23,24,24,24,25
%N A013940 a(n) = Sum_{ k=1..n } floor(n/prime(k)^2).
%Y A013940 Sequence in context: A106733 A087838 A057627 this_sequence A029129 A087842 
               A101776
%Y A013940 Adjacent sequences: A013937 A013938 A013939 this_sequence A013941 A013942 
               A013943
%K A013940 nonn
%O A013940 1,8
%A A013940 N. J. A. Sloane (njas(AT)research.att.com), Henri Lifchitz (100637.64(AT)CompuServe.COM)