The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A086522 Primes arising as the arithmetic mean of a pair of successive terms of A086519. 3
 5, 13, 31, 37, 67, 127, 109, 73, 103, 163, 181, 151, 181, 277, 271, 241, 277, 331, 373, 337, 373, 463, 547, 577, 523, 571, 607, 547, 571, 541, 547, 661, 709, 733, 811, 853, 787, 769, 823, 883, 859, 937, 991, 1021, 1087, 1009, 1069, 1129, 1039, 1231, 1381 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Second term onwards every prime == 1 (mod 6). 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.. LINKS Table of n, a(n) for n=1..51. FORMULA a(n) = (A086519(n)+A086519(n+1))/2. - David Wasserman, Mar 11 2005 CROSSREFS Cf. A086519. Sequence in context: A256314 A002768 A354292 * A234372 A102725 A271997 Adjacent sequences: A086519 A086520 A086521 * A086523 A086524 A086525 KEYWORD nonn AUTHOR Amarnath Murthy, Jul 30 2003 EXTENSIONS Corrected and extended by David Wasserman, Mar 11 2005 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified February 26 07:39 EST 2024. Contains 370335 sequences. (Running on oeis4.)