A086304 Numbers n such that n+6 is prime.

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

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

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

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

Adjacent sequences: A086301 A086302 A086303 * A086305 A086306 A086307

Keyword

nonn,easy

Author

Giovanni Teofilatto, Aug 29 2003

Extensions

Corrected and extended by Ray Chandler, Nov 29 2003

Status

approved