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 A319499 #5 Sep 21 2018 12:30:44 %S A319499 1,2,5,3,9,7,11,4,6,13,19,10,21,15,22,8,33,12,25,18,26,27,39,14,20,29, %T A319499 42,30,61,31,45,16,23,47,67,17,49,35,50,36,73,37,53,107,38,77,55,79, %U A319499 28,40,81,41,83,59,84,60,43,122,87,44,89,63,90,32,129,46,93 %N A319499 Inverse permutation to A319268. %H A319499 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %e A319499 A319268(7) = 6, hence a(6) = 7. %Y A319499 Cf. A319268. %K A319499 nonn,base %O A319499 1,2 %A A319499 _Rémy Sigrist_, Sep 20 2018