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 A089919 #13 Jul 07 2024 03:00:29 %S A089919 1,3,12,13,66,100,369 %N A089919 Numbers k such that 3^prime(k) - 2 is prime. %C A089919 No additional terms up to n=1000. - _Harvey P. Dale_, Oct 10 2016 %C A089919 a(8) > 91500, if it exists (based on the data at A014224). - _Amiram Eldar_, Jul 07 2024 %F A089919 a(n) = A000720(A086218(n)). - _Amiram Eldar_, Jul 07 2024 %t A089919 Select[Range[370],PrimeQ[3^Prime[#]-2]&] (* _Harvey P. Dale_, Oct 10 2016 *) %o A089919 (PARI) f(n) = for(x=1,n,if(ispseudoprime(3^prime(x)-2),print1(x,","))) %Y A089919 Cf. A000720, A014224, A086218. %K A089919 nonn,more %O A089919 1,2 %A A089919 _Cino Hilliard_, Jan 11 2004 %E A089919 Definition corrected by _Jorge Coveiro_, Jan 31 2006, Jul 25 2006