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 A217130 #13 Sep 08 2022 08:46:04 %S A217130 0,1,3,16,36,244,315,2577,9500,17596,25551,32193,32835,36504,75136 %N A217130 Numbers n such that 7^n + 6 is prime. %C A217130 a(16) > 10^5. - _Robert Price_, Jan 24 2014 %t A217130 Select[Range[0, 5000], PrimeQ[7^# + 6] &] %o A217130 (PARI) for(n=1, 5000, if(isprime(7^n+6), print1(n", "))) %o A217130 (Magma) /* The code produces the sequence up to 315: */ [n: n in [0..2000] | IsPrime(7^n+6)]; %Y A217130 Cf. A236371, A217131, A191469, A090669, A096305, A217130, A217132, A152213. %K A217130 nonn %O A217130 1,3 %A A217130 _Vincenzo Librandi_, Oct 01 2012 %E A217130 a(9)-a(15) from _Robert Price_, Jan 24 2014