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 A075453 #8 Mar 08 2023 13:36:36 %S A075453 5,3,17,25,41,52,59,17,85,113,145,181,221,246,253,17,313,365,103,49, %T A075453 52,499,545,613,667,704,761,841,925,249,1041,1105,1201,1301,1405,1513, %U A075453 1625,1741,1861,1961,253,2113,2245,2381,2521,2627,2700,2813,2965,3121 %N A075453 Numerator of 1/pp(n) + 1/pp(n+1), where pp(n) = A001597(n-1) is the n-th perfect power. %e A075453 a(2) = 3 because 1/pp(2) + 1/pp(3) = 1/4 + 1/8 = 3/8. %Y A075453 Cf. A001597. %K A075453 easy,nonn,frac %O A075453 1,1 %A A075453 _Zak Seidov_, Oct 11 2002 %E A075453 Edited by _Dean Hickerson_, Oct 15 2002