%N Primes for which the level is equal to 1 in A117563.
%C This sequence is equal to 13, 31, A006562, A117876, A118467, ..., A125623, ... Let p(n) denote the n-th prime. If 2 p(n) - p(n+1) is a prime, say p(n-i) and if p(n) has a level 1 in A117563, then we say that p(n) has level(1,i). Primes of level (1,1) form the sequence A006562. 13 and 31 have a level 1 but not sub-level i.
%H Remi Eismann, <a href="/A125830/b125830.txt">Table of n, a(n) for n=1..10000</a>
%Y Cf. A006562, A117876, A118467, A125623, A119402, A118464, A125576.
%A _Rémi Eismann_, Feb 03 2007