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 A370009 #14 Feb 16 2024 15:08:04
%S A370009 7,11,17,23,37,41,53,59,71,89,97,113,127,131,149,163,179,191,211,223,
%T A370009 223,239,251,269,293,307,311,331,331,347,383,397,419,419,449,457,479,
%U A370009 491,503,521,541,547,577,587,593,599,641,673,683,691,701,719,727,757
%N A370009 a(n) is the least prime greater than 3*prime(n).
%F A370009 a(n) = A151800(A001748(n)).
%e A370009 5 < 3*2 < 7 < 3*3 < 11 < 13 < 3*5 < 17, so (a(1), a(2), a(3)) = (7,11,17).
%t A370009 Table[NextPrime[Prime[PrimePi[3*Prime[n]]]], {n,1,200}]
%o A370009 (PARI) a(n) = nextprime(3*prime(n)); \\ _Michel Marcus_, Feb 10 2024
%Y A370009 Cf. A000040, A001748, A059786, A059788, A151800, A370008.
%K A370009 nonn
%O A370009 1,1
%A A370009 _Clark Kimberling_, Feb 09 2024