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%I #8 Feb 04 2021 18:17:16
%S 0,1,2,2,3,3,4,5,5,5,6,7,8,8,8,8,9,10,11,11,11,11,12,12,12,12,13,13,
%T 14,15,16,16,16,16,16,16,17,17,17,17,18,18,19,19,20,20,21,21,21,22,22,
%U 22,23,23,23,23,23,23,24,24,25,25,26,26,26,26
%N Number of badly sieved numbers <= n.
%F a(n) = Sum_{k=1..n} A099104(k).
%Y Cf. A099104, A066680, A000720.
%K nonn
%O 1,3
%A _Reinhard Zumkeller_, Dec 31 2001