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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A228486 Near primorial primes: primes p such that p+1 or p-1 is a primorial number (A002110).

Original entry on oeis.org

2, 3, 5, 7, 29, 31, 211, 2309, 2311, 30029, 200560490131, 304250263527209, 23768741896345550770650537601358309
Offset: 1

Views

Author

Jonathan Vos Post, Aug 22 2013

Keywords

Comments

The next few terms are too large to add: 317#-1, 337#-1, 379#+1, 991#-1. - Charles R Greathouse IV, Sep 12 2013

Links

Crossrefs

Cf. A000040, A002110, A057705, A228485.

Formula

A057705 UNION {primes p such that p-1 is a primorial number} = {primes p such that p+1 is a primorial number (A002110)} UNION {primes p such that p-1 is a primorial number}.

Extensions

a(1)-a(2), a(7), a(11) inserted by Charles R Greathouse IV, Sep 12 2013
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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