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A051861 Twice the positions in A051686 at which new primes appear in that sequence. 2

%I

%S 2,4,16,38,58,72,148,170,178,282,388,446,512,652,656,758,836,856,1514,

%T 1592,1648,1712,1906,1918,2034,2606,2758,4094,4936,5624,5758,5842,

%U 5924,6764,8188,10570,10922,11072,11482,13082,13972,14626,15212,16018,18986

%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.

%K nonn

%O 1,1

%A _Labos Elemer_, Dec 14 1999

%E Edited by _Jon E. Schoenfield_, May 28 2018

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Last modified August 5 04:03 EDT 2021. Contains 346457 sequences. (Running on oeis4.)