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A006166
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a(0)=0, a(1)=a(2)=1; for n>=1, a(3n+2)=2a(n+1)+a(n), a(3n+1)=a(n+1)+2a(n), a(3n)=3a(n).
(Formerly M2270)
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2
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0, 1, 1, 3, 3, 3, 3, 5, 7, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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REFERENCES
| J.-P. Allouche and J. Shallit, The ring of k-regular sequences, II, Theoret. Computer Sci., 307 (2003), 3-29.
J. Arkin, D. C. Arney, L. S. Dewald and W. E. Ebel, Jr., Families of recursive sequences, J. Rec. Math., 22 (No. 22, 1990), 85-94.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
| J.-P. Allouche and J. Shallit, The Ring of k-regular Sequences, II
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CROSSREFS
| a(n) + n = A003605(n).
Sequence in context: A156724 A196186 A075753 * A142716 A195758 A079084
Adjacent sequences: A006163 A006164 A006165 * A006167 A006168 A006169
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KEYWORD
| nonn,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Mar 28 2003
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