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 A269395 #5 Mar 03 2016 22:52:00 %S A269395 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,23,20,21,22,25,24,19,26, %T A269395 27,28,29,30,37,32,33,34,35,36,45,46,39,40,43,42,47,44,31,50,53,48,41, %U A269395 38,51,52,61,54,49,56,57,58,67,60,89,74,63,64,65,66,77,68,69,70,83,72,81,90,85,92,59,78,91,80,79 %N A269395 Permutation of natural numbers: a(n) = A269171(A269393(n)) = A269171(A269171(3*n)/3). %C A269395 Composition of A269171 with a permutation of natural numbers obtained from its trisection. %H A269395 Antti Karttunen, <a href="/A269395/b269395.txt">Table of n, a(n) for n = 1..8192</a> %H A269395 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A269395 a(n) = A269171(A269393(n)) = A269171(A269171(3*n)/3). %o A269395 (Scheme) (define (A269395 n) (A269171 (A269393 n))) %Y A269395 Inverse: A269396. %Y A269395 Cf. A269393. %Y A269395 Differs from A255407 and A269171 for the first time at n=37, which here a(37)=45, instead of 41. %K A269395 nonn %O A269395 1,2 %A A269395 _Antti Karttunen_, Mar 03 2016