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Search: id:A086801
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| -1, 0, 2, 4, 8, 10, 14, 16, 20, 26, 28, 34, 38, 40, 44, 50, 56, 58, 64, 68, 70, 76, 80, 86, 94, 98, 100, 104, 106, 110, 124, 128, 134, 136, 146, 148, 154, 160, 164, 170, 176, 178, 188, 190, 194, 196, 208, 220, 224, 226, 230, 236, 238, 248, 254, 260, 266, 268, 274, 278
(list; graph; listen)
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OFFSET
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1,3
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COMMENT
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Numbers n such that n+3 is a prime.
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REFERENCES
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M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988
Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta, UTET, CittaStudiEdizioni, Milano 1997
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FORMULA
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a(n) = 2*A067076(n) = 2*(A006254(n+1)-2).
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EXAMPLE
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n=16 is here because 16+3=19 is a prime.
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MATHEMATICA
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Prime[Range[22]]-3 - Vladimir Orlovsky (4vladimir(AT)gmail.com), Apr 29 2008
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PROGRAM
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(PARI) for(x=2, 20, print1(prime(x)-3, ", ")) - Jorge Coveiro (jorgecoveiro(AT)yahoo.com), Jan 30 2006
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CROSSREFS
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Cf. A006254, A067076.
Sequence in context: A104197 A047235 A087505 this_sequence A071703 A010069 A132895
Adjacent sequences: A086798 A086799 A086800 this_sequence A086802 A086803 A086804
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KEYWORD
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easy,sign
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AUTHOR
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Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Aug 05 2003
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EXTENSIONS
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Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 29 2003
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