%N Twice the positions in A051686 at which new primes appear in that sequence.
%C Halving this sequence gives 1, 2, 8, 19, ..., 256, 326, ..., 47764, ..., the indices in A051686 at which primes appear which have not appeared before.
%C This sequence lists the terms of A051692 in ascending order, whereas A051692 lists them in increasing order of the emerging primes in A051686.
%Y Cf. A051686, A051692, A005384.
%A _Labos Elemer_, Dec 14 1999
%E Edited by _Jon E. Schoenfield_, May 28 2018