%N Least prime p such that p - 2n is prime, but not both p-2k and p-2(n-k) are prime for 0<k<n.
%C Does a(n) exist for all n? It appears that a(3n) is less than a(3n-1) and a(3n+1) for all n except 1, 2 and 12.
%H T. D. Noe, <a href="/A155767/b155767.txt">Table of n, a(n) for n=0..2000</a>
%F a(n) = A103147(n) + n = A155766(n) + 2n.
%A _T. D. Noe_, Jan 27 2009