[seqfan] Primes of the form pq+-2.

zak seidov zakseidov at yahoo.com
Tue Nov 11 06:24:04 CET 2008


Cf. A048797, A051507:

primes of the form pq+2 (p=prime, q=nextprime(p))
are (much) more frequent than 
primes of the form pq-2, 

or in other words,
 
A048797(n) >> A051507(n), except the first term.

Any rational explanation? Thx, zak


      




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