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 A065175 #6 May 02 2017 22:17:15 %S A065175 1,3,7,5,13,2,11,9,25,6,15,4,21,10,19,17,49,14,23,12,29,18,27,8,41,22, %T A065175 31,20,37,26,35,33,97,30,39,28,45,34,43,24,57,38,47,36,53,42,51,16,81, %U A065175 46,55,44,61,50,59,40,73,54,63,52,69,58,67,65,193,62,71,60,77,66,75,56 %N A065175 Inverse permutation to A065174. %H A065175 Joe Buhler and R. L. Graham, <a href="http://www.cecm.sfu.ca/organics/papers/buhler/index.html">Juggling Drops and Descents</a>, Amer. Math. Monthly, 101, (no. 6) 1994, 507 - 519. %H A065175 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %p A065175 [seq(Z2N(N2Z(n)-TZ2(abs(N2Z(n)))), n=1..120)]; %p A065175 N2Z := n -> ((-1)^n)*floor(n/2); Z2N := z -> 2*abs(z)+`if`((z < 1),1,0); %K A065175 nonn %O A065175 1,2 %A A065175 _Antti Karttunen_, Oct 19 2001