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 A246267 #7 Aug 22 2014 16:50:01 %S A246267 1,2,4,3,7,9,5,19,6,16,14,10,34,13,25,8,61,11,12,44,22,37,24,15,94,23, %T A246267 29,79,17,28,69,30,49,18,43,58,169,20,31,52,36,64,21,142,124,39,88,47, %U A246267 40,304,91,26,27,115,223,32,51,70,46,54,86,33,547,59,219,35,109,55,38,184,119,65,41,74,80,469,42 %N A246267 Permutation of natural numbers: a(n) = A048673(A246263(n))/2. %H A246267 Antti Karttunen, <a href="/A246267/b246267.txt">Table of n, a(n) for n = 1..10001</a> %H A246267 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A246267 a(n) = A048673(A246263(n))/2. %o A246267 (Scheme) (define (A246267 n) (/ (A048673 (A246263 n)) 2)) %Y A246267 Inverse: A246268. %Y A246267 Cf. also A048673, A246263, A246265. %K A246267 nonn %O A246267 1,2 %A A246267 _Antti Karttunen_, Aug 21 2014