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 A304532 #6 May 16 2018 20:06:58 %S A304532 1,2,4,6,11,3,42,20,8,12,237,5,1798,43,14,96,7192,9,69611,16,45,238, %T A304532 431203,21,32,1799,25,47,2401568,13 %N A304532 Inverse of A304531. %C A304532 This is the left inverse of A304531, and also the right inverse if A304531 indeed is a permutation of natural numbers. %F A304532 For all n >= 1, a(A304531(n)) = n. %o A304532 (PARI) \\ Use the program given in A304531. %Y A304532 Cf. A304531 (inverse). %Y A304532 Cf. also A303752. %K A304532 nonn,hard,more %O A304532 1,2 %A A304532 _Antti Karttunen_, May 14 2018