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 A246266 #7 Aug 22 2014 16:49:51 %S A246266 1,2,3,6,8,5,4,11,9,15,20,7,12,26,17,32,16,21,35,18,10,22,39,31,42,47, %T A246266 14,53,55,25,28,13,38,40,67,41,34,72,29,81,46,24,62,87,52,93,45,23,96, %U A246266 98,63,57,60,70,77,75,19,111,112,78,116,36,85,69,121,44,74,127,56,131,135,50,89,137,30 %N A246266 Permutation of natural numbers: a(n) = A246262(A064216((2*n)-1)). %C A246266 This permutation is induced when A064216 is restricted to odd numbers (equally, when A064989 is restricted to the numbers of form 4k+1) and the resulting numbers are "ranked" with A246262. %H A246266 Antti Karttunen, <a href="/A246266/b246266.txt">Table of n, a(n) for n = 1..10001</a> %H A246266 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A246266 a(n) = A246262(A064216((2*n)-1)). %F A246266 a(n) = A246262(A064989((4*n)-3)). %o A246266 (Scheme) (define (A246266 n) (A246262 (A064216 (+ -1 n n)))) %Y A246266 Inverse: A246265. %Y A246266 Cf. also A064216, A064989, A246262, A246268. %K A246266 nonn %O A246266 1,2 %A A246266 _Antti Karttunen_, Aug 21 2014