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Search: id:A098025
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| A098025 |
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p and 2p-1 are both Pythagorean primes, i.e. congruent to 1 (mod 4). |
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+0
1
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| 37, 97, 157, 229, 337, 577, 601, 661, 829, 877, 937, 997, 1009, 1069, 1237, 1297, 1429, 1609, 1657, 2029, 2089, 2137, 2221, 2281, 2557, 2617, 3037, 3061, 3109, 3169, 3181, 3529, 3697, 3709, 3769, 3877, 4177, 4261, 4357, 4621, 4801, 4861, 4909, 5557, 5581
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OFFSET
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1,1
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COMMENT
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The product p*(2p-1) generates a family of base-2 pseudoprimes (i.e.a subsequence of A001567).
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REFERENCES
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J.-M. De Koninck and A.Mercier, 1001 Problemes en Theorie Classique Des Nombres, Problem 878 pp. 108;353, Ellipses Paris 2004.
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CROSSREFS
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Sequence in context: A117854 A145480 A033222 this_sequence A142793 A139939 A159231
Adjacent sequences: A098022 A098023 A098024 this_sequence A098026 A098027 A098028
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KEYWORD
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nonn
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AUTHOR
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Lekraj Beedassy (blekraj(AT)yahoo.com), Sep 10 2004
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EXTENSIONS
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More terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), Sep 16 2004
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