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 A301635 #21 Sep 03 2024 16:39:26
%S A301635 0,1,11,25,35,85,499,1403,3511,3739,8005
%N A301635 Numbers k such that 5^k + 5*k + 1 is prime.
%C A301635 a(12), if it exists, is greater than 20000. - _Vaclav Kotesovec_, Mar 25 2018
%C A301635 a(12), if it exists, is greater than 80000. - _Michael S. Branicky_, Sep 03 2024
%t A301635 Flatten[{0, Select[Range[1000], PrimeQ[5^# + 5*# + 1] &]}] (* _Vaclav Kotesovec_, Mar 25 2018 *)
%o A301635 (PARI) for(n=0, 500, if(isprime(5^n+5*n+1), print1(n", ")))
%Y A301635 A301638 gives the primes.
%Y A301635 Cf. A171058, A301634.
%K A301635 nonn,more
%O A301635 1,3
%A A301635 _Seiichi Manyama_, Mar 25 2018
%E A301635 a(8)-a(11) from _Vaclav Kotesovec_, Mar 25 2018