A089079 Numbers n such that 7*n - 23 is prime.

4, 6, 10, 12, 16, 18, 22, 28, 36, 40, 42, 48, 58, 60, 66, 70, 76, 78, 88, 90, 100, 102, 106, 108, 112, 126, 130, 136, 142, 148, 156, 160, 168, 172, 178, 180, 186, 190, 192, 208, 210, 216, 222, 226, 232, 240, 246, 252, 258, 262, 270, 282, 286, 288, 298, 312, 318, 328, 330, 340, 342, 346, 352, 366, 376, 388, 390, 396

Offset

1,1

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

Table of n, a(n) for n=1..68.

Prog

(Magma) [n: n in [4..400]|IsPrime(7*n-23)] // Vincenzo Librandi, Dec 17 2010
(PARI) is(n)=isprime(7*n-23) \\ Charles R Greathouse IV, Jun 12 2017

Crossrefs

a(n) = A024901(n) + 3.

Sequence in context: A310578 A165972 A156037 * A310579 A242877 A193948

Adjacent sequences: A089076 A089077 A089078 * A089080 A089081 A089082

Keyword

easy,nonn

Author

Giovanni Teofilatto, Dec 04 2003

Extensions

Corrected and extended by Vincenzo Librandi, Dec 17 2010

Offset corrected by Arkadiusz Wesolowski, Aug 09 2011

Status

approved