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 A274215 #6 Jun 13 2017 14:43:26 %S A274215 4,6,46,58,184,336,29274,98928 %N A274215 Numbers n such that 8^n + 7^(n+1) is prime. %C A274215 a(9) > 10^5. %t A274215 Select[Range[0, 100000], PrimeQ[8^# + 7^(# + 1)] &] %o A274215 (PARI) is(n)=ispseudoprime(8^n+7^(n+1)) \\ _Charles R Greathouse IV_, Jun 13 2017 %Y A274215 Cf. A093765. %K A274215 nonn,more %O A274215 1,1 %A A274215 _Robert Price_, Jun 13 2016