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 A062651 #16 Jul 04 2021 09:02:26 %S A062651 179,479 %N A062651 Numbers k such that 85^k - 84^k is prime. %C A062651 Terms greater than 1000 are often only strong pseudoprimes. %C A062651 a(3) > 10^5. - _Robert Price_, Mar 26 2015 %o A062651 (PARI) is(n)=ispseudoprime(85^n-84^n) \\ _Charles R Greathouse IV_, Jun 13 2017 %Y A062651 Cf. A000043, A057468, A059801, A059802, A062572-A062666. %K A062651 nonn,hard,bref %O A062651 1,1 %A A062651 _Mike Oakes_, May 18 2001, May 19 2001