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A086304 Numbers n such that n+6 is prime. 3
1, 5, 7, 11, 13, 17, 23, 25, 31, 35, 37, 41, 47, 53, 55, 61, 65, 67, 73, 77, 83, 91, 95, 97, 101, 103, 107, 121, 125, 131, 133, 143, 145, 151, 157, 161, 167, 173, 175, 185, 187, 191, 193, 205, 217, 221, 223, 227, 233, 235, 245, 251, 257, 263, 265, 271, 275, 277 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
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
LINKS
FORMULA
a(n) = 2*A089038(n+1)-1.
MATHEMATICA
Select[Range[0, 900], PrimeQ[# + 6] &] (* Vincenzo Librandi, Oct 16 2012 *)
PROG
(Magma) [n: n in [0..300]| IsPrime(n + 6)]; // Vincenzo Librandi, Oct 16 2012
(PARI) is(n)=isprime(n+6) \\ Charles R Greathouse IV, May 22 2017
CROSSREFS
Cf. A089038.
Sequence in context: A277907 A136144 A262084 * A193947 A120222 A054794
KEYWORD
nonn,easy
AUTHOR
Giovanni Teofilatto, Aug 29 2003
EXTENSIONS
Corrected and extended by Ray Chandler, Nov 29 2003
STATUS
approved

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Last modified May 22 13:22 EDT 2024. Contains 372755 sequences. (Running on oeis4.)