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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A316504 Numbers n such that A090086(n+1) > n+1.

Original entry on oeis.org

0, 1, 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 37, 41, 47, 53, 59, 71, 83, 89, 101, 109, 139, 149, 157, 179, 199, 307, 461, 571
Offset: 1

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Author

Thomas Ordowski, Aug 12 2018

Keywords

Comments

Probably complete.
Numbers n such that A090086(n+1) = A007535(n+1).
For n > 1, if A090086(n+1) > n+1, then n is a prime.

Crossrefs

Cf. A000040, A090086, A007535, A317851.

Programs

  • PARI
    a090086(n) = {forcomposite(k=2, , if (Mod(n, k)^(k-1) == 1, return (k)); ); }
isok(n) = a090086(n+1) > n+1; \\ Michel Marcus, Aug 12 2018
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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