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A081759
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Numbers n such that 5n+6 is prime.
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10
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1, 5, 7, 11, 13, 19, 25, 29, 35, 37, 41, 47, 49, 53, 55, 61, 65, 79, 83, 85, 91, 97, 103, 107, 113, 119, 125, 127, 131, 137, 139, 149, 151, 161, 163, 175, 181, 187, 193, 197, 203, 205, 209, 211, 217, 229, 233, 235, 239, 245, 257, 259, 263, 271, 275, 289
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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REFERENCES
| 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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LINKS
| Nathaniel Johnston, Table of n, a(n) for n = 1..10000
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FORMULA
| a(n) = 2*A024912(n+1)-1.
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MAPLE
| A081759 := proc(n) option remember: local k: if(n=1)then return 1: fi: for k from procname(n-1)+1 do if(isprime(5*k+6))then return k: fi: od: end: seq(A081759(n), n=1..100); # Nathaniel Johnston, May 28 2011
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MATHEMATICA
| Select[Range[300], PrimeQ[5# + 6] &] (*Chandler*)
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CROSSREFS
| Cf. A024912, A030430, A049511, A067076, A087505, A089192, A089253.
Sequence in context: A084441 A180950 A112397 * A155053 A152468 A088664
Adjacent sequences: A081756 A081757 A081758 * A081760 A081761 A081762
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KEYWORD
| easy,nonn
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AUTHOR
| Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Nov 21 2003
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EXTENSIONS
| Corrected by Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 22 2003
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