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Search: id:A122487
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| A122487 |
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2 together with odd primes p that divide Fibonacci[(p+1)/2]. |
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+0
5
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| 2, 13, 17, 37, 53, 73, 97, 113, 137, 157, 173, 193, 197, 233, 257, 277, 293, 313, 317, 337, 353, 373, 397, 433, 457, 557, 577, 593, 613, 617, 653, 673, 677, 733, 757, 773, 797, 853, 857, 877, 937, 953, 977, 997, 1013, 1033, 1093, 1097, 1117, 1153, 1193, 1213
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OFFSET
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1,1
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COMMENT
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Primes of the form 2x^2+2xy+13y^2. Discriminant=-100. - T. D. Noe (noe(AT)sspectra.com), May 02 2008
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FORMULA
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Except for 2, the primes are congruent to {13, 17} (mod 20). - T. D. Noe (noe(AT)sspectra.com), May 02 2008
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MATHEMATICA
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Select[Prime[Range[1000]], IntegerQ[Fibonacci[(#1+1)/2]/#1]&]
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CROSSREFS
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Cf. A000045, A033205, A045468, A003631, A053028.
Cf. A139827.
Adjacent sequences: A122484 A122485 A122486 this_sequence A122488 A122489 A122490
Sequence in context: A020480 A018459 A037384 this_sequence A109181 A067522 A128852
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KEYWORD
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nonn
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AUTHOR
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Alexander Adamchuk (alex(AT)kolmogorov.com), Sep 16 2006
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EXTENSIONS
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Definition changed by T. D. Noe (noe(AT)sspectra.com), May 02 2008
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