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Search: id:A074307
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| 0, 2, 3, 1, 11, 5, 7, 13, 6, 4, 10, 19, 9, 27, 21, 15, 29, 14, 8, 18, 35, 17, 43, 37, 23, 45, 22, 12, 26, 51, 25, 59, 53, 31, 61, 30, 16, 34, 67, 33, 75, 69, 39, 77, 38, 20, 42, 83, 41, 91, 85, 47, 93, 46, 24, 50, 99, 49, 107, 101, 55, 109, 54, 28, 58, 115, 57, 123, 117, 63, 125
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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A permutation of the nonnegative integers.
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REFERENCES
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G. Venturini, Iterates of number-theoretic functions with periodic rational coefficients (generalization of the 3x+1 problem), Stud. Appl. Math., 86 (1992), 185-218.
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LINKS
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Index entries for sequences that are permutations of the natural numbers
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PROGRAM
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(PARI) a(m) = if(m%3==0, m/3*2, if(m%3==1, (m-1)/3*4+3, (m-2)/3*4+1)) for(i=0, 120, print1(a(a(i)), ", ")) (C. Ronaldo)
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CROSSREFS
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Cf. A074305, A074306, A074308.
Sequence in context: A107855 A009026 A046222 this_sequence A163486 A007440 A100223
Adjacent sequences: A074304 A074305 A074306 this_sequence A074308 A074309 A074310
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KEYWORD
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nonn,easy
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Sep 23 2002
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EXTENSIONS
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More terms from Lambert Klasen (lambert.klasen(AT)gmx.de), Jan 02 2005
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