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 A217137 #20 Nov 11 2023 11:11:56 %S A217137 0,1,2,3,6,8,18,36,98,114,134,138,212,252,516,1166,2321,2442,2732, %T A217137 4569,8622,8709,16487,22722,25242,29928,32034,33783,34001,44934,50868, %U A217137 77861,90188,102102,171843,178226,273521 %N A217137 Numbers k such that 3^k + 10 is prime. %C A217137 a(37) > 2*10^5. - _Robert Price_, Oct 23 2013 %C A217137 a(38) > 3*10^5. - _Tyler NeSmith_, Jan 16 2021 %t A217137 Select[Range[0, 5000], PrimeQ[3^# + 10] &] %o A217137 (PARI) for(n=0, 5*10^3, if(isprime(3^n+10), print1(n", "))) %Y A217137 Cf. A014224, A051783, A058958, A058959, A102907. %K A217137 nonn,more %O A217137 1,3 %A A217137 _Vincenzo Librandi_, Oct 01 2012 %E A217137 a(21)-a(36) from _Robert Price_, Oct 23 2013 %E A217137 a(37) from _Tyler NeSmith_, Jan 16 2021