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 A332763 #45 Jul 10 2020 03:54:18 %S A332763 0,1,5,7,19,23,67,107,400,429,617,743,1065,7717,12329,14459,22425, %T A332763 114543,221983,237453 %N A332763 Numbers k such that 6*17^k + 1 is prime. %C A332763 a(21) > 3.75*10^5. - _Paul S. Vanderveen_, Jul 05 2020 %t A332763 Select[Range[0, 1000], PrimeQ[6*17^# + 1] &] (* _Amiram Eldar_, Feb 24 2020 *) %o A332763 (PARI) for(i=1,10000, if( ispseudoprime(6*17^i+1), print1(i, ", "))); %Y A332763 Cf. A141797. %K A332763 nonn,more %O A332763 1,3 %A A332763 _Paul S. Vanderveen_, Feb 22 2020 %E A332763 a(19) from _Paul S. Vanderveen_, Mar 09 2020 %E A332763 a(20) from _Paul S. Vanderveen_, Mar 15 2020