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 A220702 #8 Jun 13 2017 10:30:48 %S A220702 1,2,3,4,6,19,23,63,76,508,561,839,894,1389,2513,3436,6121,7412,8418, %T A220702 9184 %N A220702 Numbers n such that n^5 + 5*n + 5^n is prime. %t A220702 Select[Range[10000], PrimeQ[#^5 + 5*# + 5^#]&] %o A220702 (PARI) is(n)=ispseudoprime(n^5+5*n+5^n) \\ _Charles R Greathouse IV_, Jun 13 2017 %Y A220702 Cf. A220511. %K A220702 nonn %O A220702 1,2 %A A220702 _Vincenzo Librandi_, Jan 07 2013