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 A367291 #5 Nov 13 2023 12:27:13 %S A367291 1,3,5,7,2,9,11,13,15,17,19,21,23,25,27,29,4,31,33,35,37,39,41,43,45, %T A367291 47,49,51,53,55,57,59,61,63,65,67,69,71,73,75,77,79,81,83,85,87,89,91, %U A367291 93,95,97,99,101,103,105,107,109,111,113,115,117,119,121,123 %N A367291 Inverse permutation to A367290. %H A367291 Rémy Sigrist, <a href="/A367291/a367291.gp.txt">PARI program</a> %H A367291 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %e A367291 A367290(33) = 19, hence a(19) = 33. %o A367291 (PARI) See Links section. %Y A367291 Cf. A367290. %K A367291 nonn %O A367291 1,2 %A A367291 _Rémy Sigrist_, Nov 12 2023