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A065317 Largest prime divisor of n-th primorial + (n+1)-st prime. 4
5, 11, 37, 17, 101, 30047, 510529, 9699713, 1427, 76829, 789077, 659863, 810104837, 13082761331670077, 652833094897, 32589158477190044789, 1922760350154212639131, 28406001782370300553, 770555057 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..19.

R. Mestrovic, Euclid's theorem on the infinitude of primes: a historical survey of its proofs (300 BC--2012) and another new proof, arXiv preprint arXiv:1202.3670, 2012 - From N. J. A. Sloane, Jun 13 2012

FORMULA

a(n)=A006530[A002110(n)+A000040(n+1)]

EXAMPLE

n=3,3rd primorial=30,p(4)=7, sum=37, a(3)=37.

CROSSREFS

A002110, A000040, A006530, A006530, A057713, A002584, A002585, A051342 A065314-A065317.

Sequence in context: A323352 A005178 A065315 * A171268 A152563 A077466

Adjacent sequences:  A065314 A065315 A065316 * A065318 A065319 A065320

KEYWORD

nonn

AUTHOR

Labos Elemer, Oct 29 2001

STATUS

approved

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Last modified July 16 23:49 EDT 2019. Contains 325092 sequences. (Running on oeis4.)