OFFSET
1,1
COMMENTS
As difference of two odd primes, all terms are even.
LINKS
M. F. Hasler, Table of n, a(n) for n = 1..10000
PROG
(PARI) a=n->prime(prime(2*n))-prime(2*prime(n))
CROSSREFS
KEYWORD
sign
AUTHOR
M. F. Hasler, Oct 20 2013
STATUS
approved