This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A153355 #17 Jan 23 2022 20:03:29 %S A153355 4,6,12,16,18,22,28,30,36,40,46,48,54,70,72,76,78,82,84,88,90,96,100, %T A153355 102,114,120,124,132,142,144,148,154,162,166,168,172,184,186,202,204, %U A153355 208,210,214,222,226,246,250,252,256,258,264,280,282,286,288,292,298 %N A153355 Numbers k such that 5k-1 is a prime. %C A153355 One more than the value of A024897 at the same index. - _R. J. Mathar_, Jan 05 2009 %H A153355 Vincenzo Librandi, <a href="/A153355/b153355.txt">Table of n, a(n) for n = 1..1000</a> %F A153355 The set of numbers (1+A030433(k))/5, k=1,2,3,4,.... - _R. J. Mathar_, Jan 03 2009 %e A153355 5*4 - 1 = 19 is a prime, so 4 is a term; %e A153355 5*30 - 1 = 149 is a prime, so 30 is a term. %t A153355 Select[Range[400],PrimeQ[5#-1]&] (* _Vladimir Joseph Stephan Orlovsky_, Feb 25 2011*) %o A153355 (Magma) [n: n in [0..300] | IsPrime(5*n - 1)]; // _Vincenzo Librandi_, Sep 24 2012 %K A153355 nonn,easy %O A153355 1,1 %A A153355 _Vincenzo Librandi_, Dec 24 2008 %E A153355 Extended by _R. J. Mathar_, Jan 05 2009