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Search: id:A005850
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| A005850 |
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Primes p such that the NSW number A002315(p) is prime.
(Formerly M2426)
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+0
3
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| 3, 5, 7, 19, 29, 47, 59, 163, 257, 421, 937, 947, 1493, 1901, 6689, 8087, 9679, 28753, 79043, 129127, 145969, 165799, 168677, 170413, 172243
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Some of the larger entries may only correspond to probable primes.
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
P. Ribenboim, The Book of Prime Number Records. Springer-Verlag, NY, 2nd ed., 1989, p. 290.
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LINKS
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Eric Weisstein's World of Mathematics, Pell Number
Eric Weisstein's World of Mathematics, Pythagoras's Constant
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CROSSREFS
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Cf. A002315.
A099088 is a closely related sequence.
Sequence in context: A154524 A079131 A106919 this_sequence A052334 A154526 A126144
Adjacent sequences: A005847 A005848 A005849 this_sequence A005851 A005852 A005853
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KEYWORD
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nonn,nice,hard
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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6689, 8087, 9679 reported by Warut Roonguthai on the PrimeForm mailing list.
28753 found by Andrew Walker (ajw01(AT)uow.edu.au), Jul 12 2001.
129127, 145969, 165799, 168677, 170413, 172243 found by Eric Weisstein (eric(AT)weisstein.com), May 22, 2006 - Jan 25,2007 [from Mike Oakes, Mar 29 2009]
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