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 A163333 #9 Aug 27 2020 06:03:31 %S A163333 0,7,2,3,4,5,6,1,8,69,64,71,66,67,68,63,70,65,18,25,20,21,22,23,24,19, %T A163333 26,29,34,27,32,31,30,35,28,33,44,37,42,41,40,39,38,43,36,47,52,45,50, %U A163333 49,48,53,46,51,54,61,56,57,58,59,60,55,62,15,10,17,12,13,14,9,16,11 %N A163333 Self-inverse permutation of integers: A163327-conjugate of A163332. %C A163333 The integers [0,(9^k)-1] are confined to range [0,(9^k)-1]. %H A163333 A. Karttunen, <a href="/A163333/b163333.txt">Table of n, a(n) for n = 0..6560</a> %H A163333 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A163333 a(n) = A163327(A163332(A163327(n))). A163334 & A163336 give two variants of the Peano curve in an N x N grid. Cf. also A163355. %K A163333 nonn %O A163333 0,2 %A A163333 _Antti Karttunen_, Jul 29 2009