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A138945 Positive integers not in A132018. 2

%I

%S 1,9,12,15,17,20,22,24,27,29,31,33,35,37,39,41,43,45,46,48,50,52,54,

%T 56,57,59,61,63,64,66,68,69,71,73,75,76,78,80,81,83,85,86,88,89,91,93,

%U 94,96,98,99,101,102,104,106,107,109,110,112,113,115,117,118,120,121,123

%N Positive integers not in A132018.

%C Sequence A132018 was motivated by analogy to A073071.

%C The latter remains quite dense in N: up to 1000 only about every 5th number is missing, which motivated to introduce its complement in N*, A138945.

%C While A132018 starts in a similar way, it becomes more and more sparse (since A000041 grows much faster); and consequently the present sequence becomes very dense.

%o (PARI) pp=1;k=0;for(n=1,999,pp*=numbpart(n);while(k++!<=pp,print1(k"," )))

%Y Cf. A132018, A137620, A058694, A073071, A138946, A135667.

%K nonn,easy

%O 1,2

%A _M. F. Hasler_, May 04 2008

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Last modified August 10 16:56 EDT 2020. Contains 336381 sequences. (Running on oeis4.)