

A208456


Numbers n such that prime(n) <= 2^(prime(n+1)prime(n)) < prime(n+1).


0




OFFSET

1,2


COMMENTS

Next term is approximately 1.386 * 10^43. [Charles R Greathouse IV, Feb 26 2012]


LINKS

Table of n, a(n) for n=1..7.


PROG

(PARI) for(k=1, log(default(primelimit))\log(2), p=precprime(2^k); q=nextprime(2^k+1); t=2^(qp); if(p<=t&&q>t, print1(primepi(p)", "))) \\ Charles R Greathouse IV, Feb 26 2012


CROSSREFS

Cf. A206482, A208151.
Sequence in context: A308549 A212653 A323104 * A056743 A064535 A240643
Adjacent sequences: A208453 A208454 A208455 * A208457 A208458 A208459


KEYWORD

nonn


AUTHOR

Gerasimov Sergey, Feb 26 2012


EXTENSIONS

a(4) corrected, a(6)a(7) added by Charles R Greathouse IV, Feb 26 2012


STATUS

approved



