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%I #17 Jan 23 2022 20:03:29
%S 4,6,12,16,18,22,28,30,36,40,46,48,54,70,72,76,78,82,84,88,90,96,100,
%T 102,114,120,124,132,142,144,148,154,162,166,168,172,184,186,202,204,
%U 208,210,214,222,226,246,250,252,256,258,264,280,282,286,288,292,298
%N Numbers k such that 5k-1 is a prime.
%C One more than the value of A024897 at the same index. - _R. J. Mathar_, Jan 05 2009
%H Vincenzo Librandi, <a href="/A153355/b153355.txt">Table of n, a(n) for n = 1..1000</a>
%F The set of numbers (1+A030433(k))/5, k=1,2,3,4,.... - _R. J. Mathar_, Jan 03 2009
%e 5*4 - 1 = 19 is a prime, so 4 is a term;
%e 5*30 - 1 = 149 is a prime, so 30 is a term.
%t Select[Range[400],PrimeQ[5#-1]&] (* _Vladimir Joseph Stephan Orlovsky_, Feb 25 2011*)
%o (Magma) [n: n in [0..300] | IsPrime(5*n - 1)]; // _Vincenzo Librandi_, Sep 24 2012
%K nonn,easy
%O 1,1
%A _Vincenzo Librandi_, Dec 24 2008
%E Extended by _R. J. Mathar_, Jan 05 2009
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