# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a074306 Showing 1-1 of 1 %I A074306 #8 Nov 24 2023 11:25:59 %S A074306 0,2,3,1,6,5,9,4,12,8,15,7,18,11,21,10,24,14,27,13,30,17,33,16,36,20, %T A074306 39,19,42,23,45,22,48,26,51,25,54,29,57,28,60,32,63,31,66,35,69,34,72, %U A074306 38,75,37,78,41,81,40,84,44,87,43,90,47,93,46,96,50,99,49,102,53,105,52 %N A074306 Inverse of permutation in A074305. %C A074306 A permutation of the nonnegative integers. %D A074306 G. Venturini, Iterates of number-theoretic functions with periodic rational coefficients (generalization of the 3x+1 problem), Stud. Appl. Math., 86 (1992), 185-218. %H A074306 Index entries for sequences that are permutations of the natural numbers %H A074306 Index entries for linear recurrences with constant coefficients, signature (0, 1, 0, 1, 0, -1). %o A074306 (PARI) b(m)=if(m%2==0,m/2*3,if(m%4==3,(m-3)/4*3+1,(m-1)/4*3+2)) for(i=0,120,print1(b(i),",")) (C. Ronaldo) %Y A074306 Cf. A074305, A074307, A074308. %K A074306 nonn,easy %O A074306 0,2 %A A074306 _N. J. A. Sloane_, Sep 23 2002 %E A074306 More terms from Lambert Klasen (lambert.klasen(AT)gmx.de), Jan 02 2005 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE