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 A371461 #15 Apr 11 2024 10:37:28 %S A371461 0,3,2,1,13,15,12,14,9,8,11,10,6,4,7,5,53,55,52,54,61,63,60,62,49,51, %T A371461 48,50,57,59,56,58,37,36,39,38,33,32,35,34,45,44,47,46,41,40,43,42,26, %U A371461 24,27,25,18,16,19,17,30,28,31,29,22,20,23,21,213,215,212 %N A371461 Lexicographically latest sequence of distinct nonnegative integers such that for any n >= 0, A371442(a(n)) = A371442(n). %C A371461 This sequence is a self-inverse permutation of the nonnegative integers. %H A371461 Rémy Sigrist, <a href="/A371461/b371461.txt">Table of n, a(n) for n = 0..16383</a> %H A371461 Rémy Sigrist, <a href="/A371461/a371461.png">Scatterplot of the terms < 2^20</a> %H A371461 Rémy Sigrist, <a href="/A371461/a371461.gp.txt">PARI program</a> %H A371461 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %e A371461 The first terms, in decimal and in binary, are: %e A371461 n a(n) bin(n) bin(a(n)) %e A371461 -- ---- ------ --------- %e A371461 0 0 0 0 %e A371461 1 3 1 11 %e A371461 2 2 10 10 %e A371461 3 1 11 1 %e A371461 4 13 100 1101 %e A371461 5 15 101 1111 %e A371461 6 12 110 1100 %e A371461 7 14 111 1110 %e A371461 8 9 1000 1001 %e A371461 9 8 1001 1000 %e A371461 10 11 1010 1011 %e A371461 11 10 1011 1010 %e A371461 12 6 1100 110 %e A371461 13 4 1101 100 %e A371461 14 7 1110 111 %e A371461 15 5 1111 101 %e A371461 16 53 10000 110101 %o A371461 (PARI) \\ See Links section. %Y A371461 Cf. A371442. %K A371461 nonn,base %O A371461 0,2 %A A371461 _Rémy Sigrist_, Mar 24 2024