A100465 Let p(1)=2, p(2)=3, p(3)=5, ... denote the primes and let E(n) = 1 + p(1) * p(2) * ... * p(n). Sequence gives primes p such that p(n+2) | E(n).

7, 271, 307, 673

Offset

1,1

Comments

No other terms for p < 80000000.

Links

Table of n, a(n) for n=1..4.

Example

7 is a term of the sequence, because it is the 4th prime and divides E(2)=2*3+1=7 trivially. - Martin Ehrenstein, Feb 05 2021

Crossrefs

See A066735 for further information.

Cf. A006862 Euclid numbers.

Sequence in context: A015089 A179565 A069449 * A140031 A066413 A332127

Adjacent sequences: A100462 A100463 A100464 * A100466 A100467 A100468

Keyword

nonn,more

Author

Lévai Gábor (gablevai(AT)vipmail.hu), Nov 23 2004

Extensions

a(2) corrected by Martin Ehrenstein, Feb 05 2021

Status

approved