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A086522
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Primes arising as the arithmetic mean of a pair of successive terms of A086519.
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3
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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; internal format)
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OFFSET
| 1,1
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COMMENTS
| Second term onwards every prime == 1 (mod 6).
Conjecture: every prime of the type 6k+1 is a member. Comment from Vim Wenders (vim(AT)gmx.li), May 27 2008: The conjecture is worng. For example 19 is missing..
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FORMULA
| a(n) = (A086519(n)+A086519(n+1))/2. - David Wasserman (wasserma(AT)spawar.navy.mil), Mar 11 2005
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CROSSREFS
| Cf. A086519.
Sequence in context: A147492 A085555 A002768 * A102725 A203246 A106985
Adjacent sequences: A086519 A086520 A086521 * A086523 A086524 A086525
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KEYWORD
| nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jul 30 2003
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EXTENSIONS
| Corrected and extended by David Wasserman (wasserma(AT)spawar.navy.mil), Mar 11 2005
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