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 A303752 #9 May 04 2018 22:37:53 %S A303752 1,2,4,6,11,3,42,20,8,12,176,5,1343,43,14,101,8470,9,57949,16,45,177, %T A303752 302739,21,32,1344,25,47,1632898,13 %N A303752 Inverse of A303751. %H A303752 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A303752 For all n >= 1, A303751(a(n)) = n. %o A303752 (PARI) \\ See program in A303751. %Y A303752 Cf. A303751 (inverse). %K A303752 nonn,more %O A303752 1,2 %A A303752 _Antti Karttunen_, May 01 2018