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 A062652 #27 Jul 04 2021 09:02:23 %S A062652 5,11,103,227,1637,9677,41597 %N A062652 Numbers k such that 86^k - 85^k is prime. %C A062652 Terms greater than 1000 are often only strong pseudoprimes. %C A062652 All terms are prime. - _Robert Price_, Apr 14 2014 %C A062652 a(8) > 10^5. - _Robert Price_, Apr 14 2015 %t A062652 Select[Range[0, 300], If[PrimeQ[#], PrimeQ[86^# - 85^#]] &] (* _Robert Price_, Apr 14 2015 *) %o A062652 (PARI) is(n)=ispseudoprime(86^n-85^n) \\ _Charles R Greathouse IV_, Jun 12 2017 %Y A062652 Cf. A000043, A057468, A059801, A059802, A062572-A062666, A215536 (primes 87^n - 86^n). %K A062652 nonn,hard %O A062652 1,1 %A A062652 _Mike Oakes_, May 18 2001, May 19 2001 %E A062652 a(7) from _Robert Price_ (computer run by Adam Marciniec), Apr 14 2015