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 A194970 #9 Oct 18 2021 08:45:23 %S A194970 1,2,3,4,6,5,7,9,10,8,11,13,14,15,12,16,18,19,21,20,17,22,24,25,27,28, %T A194970 26,23,29,31,32,34,36,35,33,30,37,39,40,42,44,45,43,41,38,46,48,49,51, %U A194970 53,54,55,52,50,47,56,58,59,61,63,64,66,65,62,60,57,67,69,70 %N A194970 Inverse permutation of A194969; every positive integer occurs exactly once. %H A194970 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %t A194970 (See A194969.) %Y A194970 Cf. A194969 (inverse), A194959. %K A194970 nonn %O A194970 1,2 %A A194970 _Clark Kimberling_, Sep 07 2011