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 A194057 #8 Mar 19 2022 00:24:50 %S A194057 1,2,3,4,5,6,7,8,9,10,15,11,12,13,14,20,21,28,36,16,17,18,19,26,27,35, %T A194057 44,45,55,66,22,23,24,25,33,34,43,53,54,65,29,30,31,32,41,42,52,63,64 %N A194057 Inverse permutation to A194056; every positive integer occurs exactly once. %t A194057 (See A194056.) %Y A194057 Cf. A194056. %K A194057 nonn %O A194057 1,2 %A A194057 _Clark Kimberling_, Aug 13 2011