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 A194058 #8 Mar 19 2022 00:25:00 %S A194058 1,3,6,2,5,9,10,4,8,13,14,15,21,7,12,18,19,20,27,28,36,11,17,24,25,26, %T A194058 34,35,44,45,16,23,31,32,33,42,43,53,54,55,66,22,30,39,40,41,51,52,63, %U A194058 64,65,77,78,29,38,48,49,50,61,62,74,75,76,89,90,91,105,37,47 %N A194058 Inverse permutation to A194054; every positive integer occurs exactly once. %t A194058 (See A194054.) %Y A194058 Cf. A194054. %K A194058 nonn %O A194058 1,2 %A A194058 _Clark Kimberling_, Aug 15 2011