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 A126918 #12 Jun 21 2014 14:11:45 %S A126918 1,2,3,5,4,7,11,6,13,9,8,17,19,10,23,29,12,15,31,14,37,41,16,25,21,18, %T A126918 43,47,20,53,59,22,27,35,24,61,67,26,71,33,28,73,49,30,79,83,32,39,89, %U A126918 34,97,101,36,55,45,38,103,107,40,109,113,42,51,65,44,127,77,46,131,57 %N A126918 Inverse permutation to sequence A126917. %H A126918 Antti Karttunen, <a href="/A126918/b126918.txt">Table of n, a(n) for n = 1..10000</a> %H A126918 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A126918 (Scheme, requiring also defineperm1-macro from Antti Karttunen's IntSeq-library) %o A126918 (define (A126918 n) (A126917 (- n))) ;; When A126917 is defined with defineperm1-macro, it will automatically cache also the inverse values, which are then available with negative arguments. %o A126918 ;; _Antti Karttunen_, Jun 20 2014 %Y A126918 Cf. A126917, A243069. %K A126918 nonn %O A126918 1,2 %A A126918 _Leroy Quet_, Dec 31 2006 %E A126918 Extended by _Ray Chandler_, Jan 04 2007