Search: id:A140266
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%I A140266
%S A140266 1,2,3,6,8,4,7,5,9,18,20,16,24,26,22,12,14,10,19,17,21,13,11,15,25,23,
%T A140266 27,54,56,52,60,62,58,48,50,46,72,74,70,78,80,76,66,68,64,36,38,34,42,
%U A140266 44,40,30,32,28,55,53,57,49,47,51,61,59,63,37,35,39,31,29,33,43,41,45
%N A140266 Inverse permutation of A140265.
%H A140266 A. Karttunen, <a href="b140266.txt">Table of n, a(n) for n = 1..729</
               a>
%H A140266 <a href="Sindx_Per.html#IntegerPermutation">Index entries for sequences 
               that are permutations of the natural numbers</a>
%F A140266 a(n) = Z->N(A117966(n-1)), where Z->N(z) = 2z if z>0 else 2|z|+1.
%o A140266 (Scheme:) (string-append (define (A140266 n) (Z->N (A117966 (- n 1))))
%o A140266 (define (Z->N n) (if (positive? n) (* n 2) (+ 1 (* 2 (- n))))))
%Y A140266 Inverse: A140265. a(n) = A140264(n-1)+1.
%Y A140266 Sequence in context: A088414 A133441 A086254 this_sequence A140265 A127293 
               A138343
%Y A140266 Adjacent sequences: A140263 A140264 A140265 this_sequence A140267 A140268 
               A140269
%K A140266 nonn
%O A140266 1,2
%A A140266 Antti Karttunen (His-Firstname.His-Surname(AT)gmail.com), May 19 2008

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