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 A200729 #22 Jul 17 2017 02:28:05 %S A200729 4,8,216,2116,551368,47444544,17649109134656 %N A200729 Smallest nontrivial positive power x such that the number of even powers (i.e., even base) not exceeding x exceeds by n the number of odd powers not exceeding x. %C A200729 A nontrivial power is a^b where a,b are integers and b>1. %e A200729 a(2)=216 because there are 11 even powers not larger than 216 and 9 odd powers not larger than 216, and 9 - 7 = 2. %Y A200729 Cf. A200730. %K A200729 nonn,more %O A200729 0,1 %A A200729 _Graeme McRae_, Nov 21 2011