

A066267


Numbers k such that A066266(k) is prime.


3




OFFSET

1,2


COMMENTS

The next term, if it exists, is greater than 120.  Dmitry Kamenetsky, May 11 2009


LINKS

Table of n, a(n) for n=1..6.
R. Mestrovic, Euclid's theorem on the infinitude of primes: a historical survey of its proofs (300 BC2012) and another new proof, arXiv preprint arXiv:1202.3670, 2012  From N. J. A. Sloane, Jun 13 2012
C. Rivera, Primorial product numbers
Eric Weisstein's World of Mathematics, Primorial.


MATHEMATICA

t={}; Do[If[PrimeQ[Times@@Table[Times@@Prime[Range[n]], {n, k}]+1], AppendTo[t, k]], {k, 35}]; t (* Jayanta Basu, May 12 2013 *)


CROSSREFS

Cf. A066266, A066268, A066269, A002110, A006939, A005234.
Sequence in context: A287553 A102718 A219954 * A084122 A042143 A042467
Adjacent sequences: A066264 A066265 A066266 * A066268 A066269 A066270


KEYWORD

nonn,hard,more


AUTHOR

Patrick De Geest, Dec 16 2001


EXTENSIONS

Offset changed from 0 to 1 by Harry J. Smith, Feb 08 2010
Name simplified by Jon E. Schoenfield, Oct 25 2019


STATUS

approved



