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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A199191 Numbers k such that 3^(2k-3) + 3^(k-1) + 1 is prime.

Original entry on oeis.org

2, 3, 4, 5, 6, 10, 11, 41, 83, 160, 178, 526, 881, 2578, 3772, 11873
Offset: 1

Views

Author

Michel Lagneau, Nov 03 2011

Keywords

Comments

Numbers k such that A198410(k) is prime.

Crossrefs

Cf. A198410, A199192.

Programs

  • Mathematica
    Select[Range[250], PrimeQ[((3^(#-1) + 1)^3 -1)/3^#]&]

Extensions

a(16) from Michael S. Branicky, May 12 2023
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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