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Search: id:A082421
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| A082421 |
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Numbers n such that P(n+1) < P(n) < P(n+2), where P(n) = largest prime factor of n (A006530). |
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+0
2
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| 3, 5, 11, 15, 17, 29, 35, 39, 41, 44, 49, 51, 55, 59, 63, 65, 69, 71, 80, 87, 95, 99, 101, 104, 107, 111, 116, 129, 137, 143, 149, 153, 155, 161, 164, 179, 186, 191, 195, 197, 203, 209, 224, 227, 230, 237, 239, 242, 249, 255, 265, 267, 269, 272, 279, 281, 285, 291, 296, 299
(list; graph; listen)
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OFFSET
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1,1
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REFERENCES
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Antal Balog, On the largest prime factor of consecutive integers, Abstracts Amer. Math. Soc., 25 (No. 2, 2002), p. 337, #975-11-76.
P. Erdos and C. Pomerance, On the largest prime factors of n and n+1, Aequationes Math. vol. 17, 1978, pp. 311-321.
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LINKS
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T. D. Noe, Table of n, a(n) for n=1..1000
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CROSSREFS
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Cf. A006530, A082417-A082422, A071869, A071870.
Sequence in context: A024897 A048702 A003546 this_sequence A153798 A105772 A034169
Adjacent sequences: A082418 A082419 A082420 this_sequence A082422 A082423 A082424
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Apr 25 2003
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