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 A304086 #4 May 12 2018 14:44:46 %S A304086 0,1,3,6,11,2,20,7,37,13,70,5,134,23,15,259,512,45,1031,10,26,75,2061, %T A304086 4,3974,149,49,29,8148,14,16167,292,80,551,19,41,32381,1061,159,12, %U A304086 64785,32 %N A304086 Inverse of A304085. %H A304086 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A304086 a(n) = A304084(A052331(n)). %Y A304086 Cf. A304085 (inverse). %Y A304086 Cf. A052331, A304084. %K A304086 nonn %O A304086 1,3 %A A304086 _Antti Karttunen_, May 06 2018