

A187779


Numbers n for which the terms of A014320 up to n=A014320(k) are a permutation of {1,2,4,6,...,2*(k1)}


1




OFFSET

1,2


COMMENTS

An old conjecture states that the equation prime(n+1)prime(n)=2m is solvable for m=1/2,1,2,... . a(n) indicate the smallest term of A014320 such that among the previous terms there occur 1 and all previous even numbers<=a(n). The primes up to 10^8 do not generate any further terms.
According to T. R. Nicely (see Links) the next term, if it exists, must be greater than 1344 and equal to a gap occurring between primes greater than 4*10^18.  Giovanni Resta, Jan 06 2013


LINKS

Table of n, a(n) for n=1..9.
Thomas R. Nicely,First occurrence prime gaps


CROSSREFS

Essentially equivalent to A179985.
Sequence in context: A063008 A059901 A136101 * A086141 A067883 A283769
Adjacent sequences: A187776 A187777 A187778 * A187780 A187781 A187782


KEYWORD

nonn


AUTHOR

Peter J. C. Moses, Jan 05 2013


EXTENSIONS

Definition corrected by Giovanni Resta, Jan 05 2013


STATUS

approved



