login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Inverse permutation to sequence A126917.
4

%I #12 Jun 21 2014 14:11:45

%S 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 43,47,20,53,59,22,27,35,24,61,67,26,71,33,28,73,49,30,79,83,32,39,89,

%U 34,97,101,36,55,45,38,103,107,40,109,113,42,51,65,44,127,77,46,131,57

%N Inverse permutation to sequence A126917.

%H Antti Karttunen, <a href="/A126918/b126918.txt">Table of n, a(n) for n = 1..10000</a>

%H <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>

%o (Scheme, requiring also defineperm1-macro from Antti Karttunen's IntSeq-library)

%o (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 ;; _Antti Karttunen_, Jun 20 2014

%Y Cf. A126917, A243069.

%K nonn

%O 1,2

%A _Leroy Quet_, Dec 31 2006

%E Extended by _Ray Chandler_, Jan 04 2007