OFFSET
1,8
COMMENTS
conjecture : for n>2104 there is at least one such pair of primes p+q=2*n
LINKS
Pierre CAMI, Table of n, a(n) for n=1..50000
EXAMPLE
3+13=16,5+11=16 so for n=8 2 pairs p,q such that p+q=2*8, p<(q-2) p and q have a twin prime
PROG
(Haskell)
a159700 n = length $ filter (\(p, q) -> p < q - 2 && a164292 q == 1) $
zip ps (map (2 * n -) ps)
where ps = filter ((== 1) . a164292) [1..n]
-- Reinhard Zumkeller, Mar 13 2014
CROSSREFS
KEYWORD
nonn,look
AUTHOR
Pierre CAMI, Apr 20 2009
STATUS
approved