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A086522 Primes arising as the arithmetic mean of a pair of successive terms of A086519. 3

%I

%S 5,13,31,37,67,127,109,73,103,163,181,151,181,277,271,241,277,331,373,

%T 337,373,463,547,577,523,571,607,547,571,541,547,661,709,733,811,853,

%U 787,769,823,883,859,937,991,1021,1087,1009,1069,1129,1039,1231,1381

%N Primes arising as the arithmetic mean of a pair of successive terms of A086519.

%C Second term onwards every prime == 1 (mod 6).

%C Conjecture: every prime of the type 6k+1 is a member. Comment from _Vim Wenders_, May 27 2008: The conjecture is worng. For example 19 is missing..

%F a(n) = (A086519(n)+A086519(n+1))/2. - _David Wasserman_, Mar 11 2005

%Y Cf. A086519.

%K nonn

%O 1,1

%A _Amarnath Murthy_, Jul 30 2003

%E Corrected and extended by _David Wasserman_, Mar 11 2005

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Last modified September 23 20:42 EDT 2021. Contains 347617 sequences. (Running on oeis4.)