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Search: id:A072669
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| A072669 |
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Primes of the form prime(x) + prime(x+1) - 1. |
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+0
7
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| 7, 11, 17, 23, 29, 41, 59, 67, 83, 89, 127, 137, 151, 197, 239, 257, 307, 359, 383, 389, 409, 433, 449, 461, 479, 491, 547, 557, 563, 599, 617, 647, 683, 701, 739, 751, 761, 797, 809, 827, 839, 863, 881, 929, 977, 1063, 1087, 1103, 1163, 1229, 1249, 1283, 1289, 1319, 1373
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OFFSET
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1,1
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COMMENT
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Consider m such that prime(m) + prime(m+1) = prime(k) + 1 for some k; sequence gives prime(k).
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MATHEMATICA
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f[n_] := Prime[n] + Prime[n + 1] - 1; f[ # ] & /@ Select[ Range[120], PrimeQ[ f[ # ]] &] (from Robert G. Wilson v Apr 14 2004)
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CROSSREFS
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Cf. A001043, A092738, A072666, A072667.
Sequence in context: A063639 A131229 A092737 this_sequence A108101 A158350 A048203
Adjacent sequences: A072666 A072667 A072668 this_sequence A072670 A072671 A072672
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KEYWORD
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nonn
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AUTHOR
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Herman H. Rosenfeld (herm3(AT)pacbell.net), Aug 12 2002
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EXTENSIONS
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Definition rewordrd by Jorge Coveiro (jorgecoveiro(AT)yahoo.com), Apr 12 2004
Edited by N. J. A. Sloane (njas(AT)research.att.com), Sep 14 2008 at the suggestion of R. J. Mathar
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