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 A216375 #24 Jul 12 2018 11:28:20 %S A216375 0,1,5,941,23071 %N A216375 Numbers k such that 11^k + k^11 + 1 is prime. %C A216375 a(6) > 10^5. - _Robert Price_, Jan 16 2013 %t A216375 Select[Range[0, 5000], PrimeQ[11^# + #^11 + 1] &] %o A216375 (PARI) is(n)=isprime(11^n+n^11+1) \\ _Charles R Greathouse IV_, Feb 17 2017 %Y A216375 Cf. A100357, A215434-A215445. %K A216375 nonn,hard,more %O A216375 1,3 %A A216375 _Vincenzo Librandi_, Sep 06 2012 %E A216375 a(5) from _Robert Price_, Jan 16 2014