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A108725 Numbers n such that 11*n + 19 is prime. 1

%I #17 Nov 12 2019 17:38:43

%S 0,2,8,12,14,20,24,30,44,48,50,54,62,72,78,90,92,98,104,110,122,128,

%T 132,134,140,150,162,164,168,170,174,180,188,192,194,212,218,230,234,

%U 240,252,258,260,272,282,288,290,294,300,308,318,320,324,332,344,348,362

%N Numbers n such that 11*n + 19 is prime.

%C All terms must be even. - _Harvey P. Dale_, Jan 05 2019

%H Daniel Starodubtsev, <a href="/A108725/b108725.txt">Table of n, a(n) for n = 1..10000</a>

%e If n=0, then 11*n + 19 = 19 (prime).

%e If n=48, then 11*n + 19 = 547 (prime).

%p a:=proc(n) if isprime(11*n+19)=true then n else fi end: seq(a(n),n=0..400); # _Emeric Deutsch_, Jul 04 2005

%t Select[Range[0,400,2],PrimeQ[ 11#+19]&] (* _Harvey P. Dale_, Jan 05 2019 *)

%o (PARI) is(n)=isprime(11*n+19) \\ _Charles R Greathouse IV_, Jun 13 2017

%Y Cf. A108233.

%Y Cf. A017485, A141855.

%K nonn,easy

%O 1,2

%A _Parthasarathy Nambi_, Jun 21 2005

%E More terms from _Emeric Deutsch_, Jul 04 2005

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Last modified September 17 05:28 EDT 2024. Contains 375985 sequences. (Running on oeis4.)