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 A129075 Numbers n such that (n-4)/3 is prime. 1

%I

%S 10,13,19,25,37,43,55,61,73,91,97,115,127,133,145,163,181,187,205,217,

%T 223,241,253,271,295,307,313,325,331,343,385,397,415,421,451,457,475,

%U 493,505,523,541,547,577,583,595,601,637,673,685,691,703,721,727,757

%N Numbers n such that (n-4)/3 is prime.

%H Harvey P. Dale, <a href="/A129075/b129075.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) = 3*prime(n) + 4. - Zak Seidov, May 12 2007

%e For n=10, (10-4)/3 = 2 which is prime so 10 is the first entry.

%t Select[Range[7,1000,3],PrimeQ[(#-4)/3]&] (* _Harvey P. Dale_, Aug 17 2021 *)

%o (PARI) g(m) = forprime(p=2,m,n=3*p+4;print1(n","))

%Y Cf. A000040.

%K easy,nonn

%O 1,1

%A _Cino Hilliard_, May 11 2007, May 17 2007

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Last modified May 21 05:07 EDT 2022. Contains 353887 sequences. (Running on oeis4.)