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 A245448 #8 Jul 23 2014 10:22:00 %S A245448 1,2,3,4,5,11,10,7,9,14,17,31,13,6,12,34,8,23,59,41,71,16,19,39,25,26, %T A245448 58,37,61,30,44,22,33,49,18,85,86,15,38,69,29,151,35,55,42,107,57,97, %U A245448 106,21,191,122,53,111,134,74,145,109,46,82,89,50,47,36,157,133,121,43,92,110,68,52,131,28 %N A245448 Permutation of natural numbers: a(n) = A064216(A064216(n)). %H A245448 Antti Karttunen, <a href="/A245448/b245448.txt">Table of n, a(n) for n = 1..10001</a> %H A245448 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A245448 a(n) = A064216(A064216(n)). %F A245448 For all n >= 1, A243502(n) = A243501(a(n)). %o A245448 (Scheme) %o A245448 (define (A245448 n) (A064216 (A064216 n))) %Y A245448 Inverse: A245447. %Y A245448 Fixed points: A245449. %Y A245448 Cf. A064216, A243501, A243502. %K A245448 nonn %O A245448 1,2 %A A245448 _Antti Karttunen_, Jul 22 2014