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Search: id:A081415
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| A081415 |
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Triply balanced primes: primes which are averages of both their immediate neighbor, their second neighbors and their third neighbors. |
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+0
7
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| 683783, 1056317, 1100261, 2241709, 2815301, 4746359, 10009049, 12003209, 13810981, 14907649, 15403009, 15730067, 16595081, 17518201, 19755301, 20378327, 21006487, 21574453, 21579983, 22237121, 22625179, 25876901
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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Jud McCranie, Table of n, a(n) for n = 1..1000
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EXAMPLE
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p = 683383: 683747 + ... + p + .. + 683819 = 7p;683759 + .. + p + .. + 683807 = 5p;
683777 + p + 683789 = 3p
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MATHEMATICA
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a = {}; Do[p = 2Prime[n]; If[p == Prime[n - 1] + Prime[n + 1], If[p == Prime[n - 2] + Prime[n + 2], If[p == Prime[n - 3] + Prime[n + 3], {n, 5, 1100000}] (from Robert G. Wilson v Jun 28 2004)
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CROSSREFS
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Cf. A006562, A051795, A096710, A055380.
Sequence in context: A119404 A014886 A010095 this_sequence A101698 A068745 A010084
Adjacent sequences: A081412 A081413 A081414 this_sequence A081416 A081417 A081418
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Apr 02 2003
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