A108232 Numbers n such that 11*n - 7 is prime.

4, 6, 10, 18, 24, 34, 36, 40, 46, 48, 54, 58, 60, 66, 76, 90, 96, 100, 108, 118, 130, 136, 138, 148, 156, 160, 174, 178, 180, 184, 186, 190, 204, 208, 214, 240, 244, 246, 264, 270, 298, 306, 316, 318, 324, 330, 340, 348, 358, 366, 376, 384, 388, 390, 394, 396

Offset

1,1

Links

A.H.M. Smeets, Table of n, a(n) for n = 1..20000

Example

If n=4, then 11*n - 7 = 37 (prime).
If n=48, then 11*n - 7 = 521 (prime).

Maple

a:=proc(n) if isprime(11*n-7)=true then n else fi end: seq(a(n), n=1..450); # Emeric Deutsch, Jun 26 2005

Mathematica

Select[Range[500], PrimeQ[11#-7]&] (* Harvey P. Dale, Jul 16 2014 *)

Prog

(PARI) is(n)=isprime(11*n-7) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Cf. A108187.

Sequence in context: A361564 A165186 A310590 * A027976 A108900 A076995

Adjacent sequences: A108229 A108230 A108231 * A108233 A108234 A108235

Keyword

nonn,easy

Author

Parthasarathy Nambi, Jun 16 2005

Extensions

More terms from Emeric Deutsch, Jun 26 2005

Status

approved