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 A250552 #5 Dec 10 2014 23:58:52 %S A250552 1,2,3,4,5,9,6,10,7,13,11,14,8,15,12,18,16,19,17,23,20,24,21,33,22,30, %T A250552 25,32,26,34,27,36,28,37,29,40,31,41,35,43,38,44,39,45,42,46,47,48,49, %U A250552 50,51,53,54,56,52,57,55,60,58,61,59,64,62,66,63,65,68 %N A250552 A049084(A247797(n)). %C A250552 A000040(a(n)) = A247797(n); %C A250552 a permutation of the positive integers with inverse A250553. %H A250552 Reinhard Zumkeller, <a href="/A250552/b250552.txt">Table of n, a(n) for n = 1..10000</a> %H A250552 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A250552 (Haskell) %o A250552 a250552 = a049084 . a247797 %Y A250552 Cf. A049084, A247797, A250553 (inverse), A247204 (fixed points). %K A250552 nonn %O A250552 1,2 %A A250552 _Reinhard Zumkeller_, Dec 10 2014