cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A138945 Positive integers not in A132018.

Original entry on oeis.org

1, 9, 12, 15, 17, 20, 22, 24, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 46, 48, 50, 52, 54, 56, 57, 59, 61, 63, 64, 66, 68, 69, 71, 73, 75, 76, 78, 80, 81, 83, 85, 86, 88, 89, 91, 93, 94, 96, 98, 99, 101, 102, 104, 106, 107, 109, 110, 112, 113, 115, 117, 118, 120, 121, 123
Offset: 1

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Author

M. F. Hasler, May 04 2008

Keywords

Comments

Sequence A132018 was motivated by analogy to A073071.
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.
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.

Crossrefs

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

Programs

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