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 A153319 #11 Dec 13 2019 16:59:43
%S A153319 7,17,37,47,67,89,97,103,107,113,127,131,137,151,157,167,179,181,191,
%T A153319 197,223,227,233,257,277,281,283,293,307,311,317,337,347,359,367,373,
%U A153319 383,389,397,419,421,439,443,457,461,463,467,479,487,499,509,523,541
%N A153319 Primes p such that 6*p-7 is not prime.
%H A153319 Harvey P. Dale, <a href="/A153319/b153319.txt">Table of n, a(n) for n = 1..2000</a>
%t A153319 lst={};Do[p=Prime[n];If[ !PrimeQ[6*p-7],AppendTo[lst,p]],{n,6!}];lst
%t A153319 Select[Prime[Range[100]],!PrimeQ[6#-7]&] (* _Harvey P. Dale_, Dec 13 2019 *)
%Y A153319 Cf. A153134, A153135, A153245
%K A153319 nonn
%O A153319 1,1
%A A153319 _Vladimir Joseph Stephan Orlovsky_, Dec 23 2008, Jan 02 2009
%E A153319 Typo in definition fixed by _Zak Seidov_, Nov 14 2011