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 A233275 #15 Jun 11 2017 06:43:59 %S A233275 0,1,3,2,6,7,5,4,12,13,14,10,15,11,9,8,24,25,26,28,27,29,20,30,21,22, %T A233275 18,31,23,19,17,16,48,49,50,52,51,53,56,54,57,58,40,55,59,41,60,42,61, %U A233275 44,36,43,45,62,46,37,38,34,63,47,39,35,33,32,96,97,98,100 %N A233275 Permutation of nonnegative integers obtained by entangling complementary pair A005187 & A055938 with even and odd numbers. %C A233275 It seems that for all n, a(A000079(n)) = A003945(n). %H A233275 Antti Karttunen, <a href="/A233275/b233275.txt">Table of n, a(n) for n = 0..8191</a> %H A233275 Indranil Ghosh, <a href="/A233275/a233275.txt">Python Program to generate the sequence</a> %H A233275 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A233275 a(0)=0, a(1)=1, and thereafter, if A079559(n)=1, a(n) = 2*a(A213714(n)-1), else a(n) = 1+(2*a(A234017(n))). %F A233275 a(n) = A054429(A233277(n)). [Follows from the definitions of these sequences] %o A233275 (Scheme, with memoizing definec-macro from _Antti Karttunen_'s IntSeq-library) %o A233275 (definec (A233275 n) (cond ((< n 2) n) ((not (zero? (A079559 n))) (* 2 (A233275 (- (A213714 n) 1)))) (else (+ 1 (* 2 (A233275 (A234017 n))))))) %Y A233275 Inverse permutation: A233276. %Y A233275 Cf. also A079559, A213714, A234017, A054429. %Y A233275 Similarly constructed permutation pairs: A135141/A227413, A232751/A232752, A233277/A233278, A233279/A233280, A003188/A006068. %K A233275 nonn %O A233275 0,3 %A A233275 _Antti Karttunen_, Dec 18 2013