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 A254672 #10 Sep 08 2022 08:46:11 %S A254672 5,7,11,17,19,29,31,37,43,47,53,67,71,73,79,89,101,109,113,127,149, %T A254672 151,157,167,181,191,193,197,227,257,263,271,277,281,331,347,349,379, %U A254672 383,431,433,449,467,479,499,509,521,523,547,563,569,571,577,587,619,631 %N A254672 Primes prime(n) such that prime(n) + 6*n is also prime. %H A254672 Vincenzo Librandi, <a href="/A254672/b254672.txt">Table of n, a(n) for n = 1..1000</a> %e A254672 prime(5) = 11 is in the sequence because 11 + 6*5 = 41 is prime. %e A254672 prime(8) = 19 is in the sequence because 19 + 6*8 = 67 is prime. %t A254672 Prime[Select[Range[150], PrimeQ[Prime[#] + 6 #] &]] %o A254672 (Magma) [NthPrime(n): n in [1..200] | IsPrime(NthPrime(n)+6*n)] %Y A254672 Cf. A061067, A231232, A231383, A254462, A254665, A254673. %K A254672 nonn %O A254672 1,1 %A A254672 _Vincenzo Librandi_, Feb 05 2015