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 A215536 #15 Jun 06 2017 14:30:34 %S A215536 2,3,47,44563 %N A215536 Numbers n such that 87^n - 86^n is prime. %C A215536 a(5) > 10^5. - _Robert Price_, May 11 2015 %t A215536 Select[Prime[Range[PrimePi[1000]]], PrimeQ[87^# - 86^#] &] (* _T. D. Noe_, Aug 15 2012 *) %o A215536 (PARI) is(n)=ispseudoprime(87^n-86^n) \\ _Charles R Greathouse IV_, Jun 06 2017 %K A215536 nonn,hard %O A215536 1,1 %A A215536 _Jean-Louis Charton_, Aug 15 2012 %E A215536 a(4) from Robert Price (computer run by Adam Marciniec), May 11 2015