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A029747
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2^n times 1, 3 or 5.
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4
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1, 2, 3, 4, 5, 6, 8, 10, 12, 16, 20, 24, 32, 40, 48, 64, 80, 96, 128, 160, 192, 256, 320, 384, 512, 640, 768, 1024, 1280, 1536, 2048, 2560, 3072, 4096, 5120, 6144, 8192, 10240, 12288, 16384, 20480, 24576, 32768
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Fixed points of the Doudna sequence: A005940(a(n))=A005941(a(n))=a(n). - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 23 2006
Subsequence of A103969. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Mar 06 2010]
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FORMULA
| a(n) = if n<5 then n+1 else 2*a(n-3). - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 23 2006
G.f.: (1+x+x^2)^2/(1-2*x^3). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Mar 06 2010]
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CROSSREFS
| Cf. A122132, A000079, A007283, A020714.
Sequence in context: A018541 A018293 A015702 * A095381 A158292 A141341
Adjacent sequences: A029744 A029745 A029746 * A029748 A029749 A029750
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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