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 A064956 #14 Jul 13 2013 12:02:40 %S A064956 1,2,3,7,11,4,16,8,5,12,28,6,33,17,13,9,43,14,50,10,15,29,60,19,22,34, %T A064956 20,18,68,21,79,25,27,44,23,26,96,51,32,24,104,37,113,30,38,61,119,31, %U A064956 56,39,42,35,137,48,40,36,49,69,146,41,156,80,57,46,54,58,173,45,59,55 %N A064956 Inverse permutation to A064417. %H A064956 Reinhard Zumkeller, <a href="/A064956/b064956.txt">Table of n, a(n) for n = 1..10000</a> %H A064956 J. C. Lagarias, E. M. Rains and N. J. A. Sloane, <a href="http://arXiv.org/abs/math.NT/0204011">The EKG sequence</a>, Exper. Math. 11 (2002), 437-446. %H A064956 <a href="/index/Ed#EKG">Index entries for sequences related to EKG sequence</a> %H A064956 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A064956 (Haskell) %o A064956 import Data.List (elemIndex) %o A064956 import Data.Maybe (fromJust) %o A064956 a064956 n = (fromJust $ elemIndex n a064417_list) + 1 %o A064956 -- _Reinhard Zumkeller_, Nov 13 2011 %Y A064956 Cf. A064417, A064413. %K A064956 nonn,easy %O A064956 1,2 %A A064956 _N. J. A. Sloane_, Oct 30 2001 %E A064956 More terms from _Naohiro Nomoto_, Oct 31 2001