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A133464
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a(3n)=4^n, a(3n+1)=2*4^n, a(3n+2)=3*4^n.
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5
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1, 2, 3, 4, 8, 12, 16, 32, 48, 64, 128, 192, 256, 512, 768, 1024, 2048, 3072, 4096, 8192, 12288, 16384, 32768, 49152, 65536, 131072, 196608, 262144, 524288, 786432, 1048576, 2097152, 3145728, 4194304, 8388608, 12582912, 16777216, 33554432
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| a(n) = A140740(n+3,3). - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 26 2008
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FORMULA
| O.g.f.: -(1+2*x+3*x^2)/(-1+4*x^3) . 2*a(n)-a(n+1) = abs(A117902(n+1)). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 30 2007
a(n+1) = a(n) + a(n - n mod 3). - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 26 2008
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CROSSREFS
| Cf. A000079, A038754, A140730, A037124.
Sequence in context: A115271 A189375 A062923 * A085635 A013914 A060200
Adjacent sequences: A133461 A133462 A133463 * A133465 A133466 A133467
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KEYWORD
| nonn
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AUTHOR
| Paul Curtz (bpcrtz(AT)free.fr), Nov 28 2007
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EXTENSIONS
| Edited by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 30 2007
More terms from Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 26 2008
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