This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A086522 #6 Dec 05 2013 19:56:19 %S A086522 5,13,31,37,67,127,109,73,103,163,181,151,181,277,271,241,277,331,373, %T A086522 337,373,463,547,577,523,571,607,547,571,541,547,661,709,733,811,853, %U A086522 787,769,823,883,859,937,991,1021,1087,1009,1069,1129,1039,1231,1381 %N A086522 Primes arising as the arithmetic mean of a pair of successive terms of A086519. %C A086522 Second term onwards every prime == 1 (mod 6). %C A086522 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 A086522 a(n) = (A086519(n)+A086519(n+1))/2. - _David Wasserman_, Mar 11 2005 %Y A086522 Cf. A086519. %K A086522 nonn %O A086522 1,1 %A A086522 _Amarnath Murthy_, Jul 30 2003 %E A086522 Corrected and extended by _David Wasserman_, Mar 11 2005