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 A141802 #8 Dec 14 2023 09:53:19 %S A141802 0,1,3,5,7,23,177,327,875,6645,26605 %N A141802 Numbers n such that 2*29^n + 1 is prime. %C A141802 Primes found and proved by PrimeForm. No more terms up to 20000. %o A141802 (PARI) is(n)=ispseudoprime(2*29^n+1) \\ _Charles R Greathouse IV_, Jun 06 2017 %Y A141802 Cf. A141798. %K A141802 nonn,more,hard %O A141802 1,3 %A A141802 _Rick L. Shepherd_, Jul 08 2008 %E A141802 a(11) from _Michael S. Branicky_, Dec 14 2023