

A074306


Inverse of permutation in A074305.


3



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, 39, 19, 42, 23, 45, 22, 48, 26, 51, 25, 54, 29, 57, 28, 60, 32, 63, 31, 66, 35, 69, 34, 72, 38, 75, 37, 78, 41, 81, 40, 84, 44, 87, 43, 90, 47, 93, 46, 96, 50, 99, 49, 102, 53, 105, 52
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OFFSET

0,2


COMMENTS

A permutation of the nonnegative integers.


REFERENCES

G. Venturini, Iterates of numbertheoretic functions with periodic rational coefficients (generalization of the 3x+1 problem), Stud. Appl. Math., 86 (1992), 185218.


LINKS

Table of n, a(n) for n=0..71.
Index entries for sequences that are permutations of the natural numbers


PROG

(PARI) b(m)=if(m%2==0, m/2*3, if(m%4==3, (m3)/4*3+1, (m1)/4*3+2)) for(i=0, 120, print1(b(i), ", ")) (C. Ronaldo)


CROSSREFS

Cf. A074305, A074307, A074308.
Sequence in context: A189970 A076631 A035485 * A294218 A036039 A279038
Adjacent sequences: A074303 A074304 A074305 * A074307 A074308 A074309


KEYWORD

nonn,easy


AUTHOR

N. J. A. Sloane, Sep 23 2002


EXTENSIONS

More terms from Lambert Klasen (lambert.klasen(AT)gmx.de), Jan 02 2005


STATUS

approved



