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
Examples
If n=4, then 11*n - 7 = 37 (prime). If n=48, then 11*n - 7 = 521 (prime).
Links
- A.H.M. Smeets, Table of n, a(n) for n = 1..20000
Crossrefs
Cf. A108187.
Programs
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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
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Mathematica
Select[Range[500],PrimeQ[11#-7]&] (* Harvey P. Dale, Jul 16 2014 *)
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PARI
is(n)=isprime(11*n-7) \\ Charles R Greathouse IV, Jun 13 2017
Extensions
More terms from Emeric Deutsch, Jun 26 2005