A074306 Inverse of permutation in A074305.

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

Offset

0,2

Comments

A permutation of the nonnegative integers.

References

G. Venturini, Iterates of number-theoretic functions with periodic rational coefficients (generalization of the 3x+1 problem), Stud. Appl. Math., 86 (1992), 185-218.

Links

Table of n, a(n) for n=0..71.

Index entries for sequences that are permutations of the natural numbers

Index entries for linear recurrences with constant coefficients, signature (0, 1, 0, 1, 0, -1).

Prog

(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)

Crossrefs

Cf. A074305, A074307, A074308.

Sequence in context: A189970 A076631 A035485 * A294218 A356013 A366139

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