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 A062620 #25 Jul 04 2021 08:43:58 %S A062620 2,479,1129,2549,11003 %N A062620 Numbers k such that 54^k - 53^k is prime. %C A062620 Terms greater than 1000 often correspond only to strong probable primes. %C A062620 a(6) > 10^5. - _Robert Price_, Feb 18 2013 %o A062620 (PARI) is(n)=ispseudoprime(54^n-53^n) \\ _Charles R Greathouse IV_, Jun 13 2017 %Y A062620 Cf. A000043, A057468, A059801, A059802, A062572-A062666. %K A062620 nonn,hard %O A062620 1,1 %A A062620 _Mike Oakes_, May 18 2001, May 19 2001 %E A062620 a(5) = 11003 found by _Mike Oakes_ in Aug 2003. - _Jean-Louis Charton_, Aug 15 2012