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 A216618 #19 Jul 12 2018 11:27:57 %S A216618 0,726,1974,3336 %N A216618 Numbers k such that 10^k + k^10 + 1 is prime. %C A216618 a(5) > 10^5. - _Robert Price_, Oct 06 2015 %t A216618 Select[Range[0, 5000], PrimeQ[10^# + #^10 + 1] &] %o A216618 (PARI) is(n)=ispseudoprime(10^n+n^10+1) \\ _Charles R Greathouse IV_, Jun 13 2017 %Y A216618 Cf. A100357, A215434-A215446, A216375. %K A216618 nonn,hard,more %O A216618 1,2 %A A216618 _Vincenzo Librandi_, Sep 11 2012