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 A272829 #6 Jun 13 2017 14:42:10 %S A272829 27,43,61,105,835,2313,5907,32455,33657 %N A272829 Numbers n such that 8^n-7^(n+1) is prime. %C A272829 a(10) > 10^5. - _Robert Price_, May 04 2016 %t A272829 Select[Range[15,100000],PrimeQ[8^# - 7^(# + 1)]] %o A272829 (PARI) is(n)=ispseudoprime(8^n-7^(n+1)) \\ _Charles R Greathouse IV_, Jun 13 2017 %Y A272829 Cf. A093765, A093713. %K A272829 nonn,more %O A272829 1,1 %A A272829 _Robert Price_, May 07 2016