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 A274135 #6 Jun 10 2016 22:10:11 %S A274135 1,4,6,9,12,15,18,21,34,36,75,102,231,256,309,513,748,3789,12378,36378 %N A274135 Numbers n such that 6^n + 5^(n+1) is prime. %C A274135 a(21) > 10^5. %t A274135 Select[Range[0,100000], PrimeQ[6^n + 5^(n + 1)] &] %o A274135 (PARI) is(n)=ispseudoprime(6^n + 5^(n+1)) \\ _Charles R Greathouse IV_, Jun 10 2016 %o A274135 (PFGW) ABC2 6^$a + 5^($a+1) %o A274135 a: from 1 to 100000 %o A274135 _Charles R Greathouse IV_, Jun 10 2016 %Y A274135 Cf. A093765. %K A274135 nonn,more %O A274135 1,2 %A A274135 _Robert Price_, Jun 10 2016