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Search: id:A136412
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| 2, 7, 27, 107, 427, 1707, 6827, 27307, 109227, 436907, 1747627, 6990507, 27962027, 111848107, 447392427, 1789569707, 7158278827, 28633115307, 114532461227, 458129844907, 1832519379627, 7330077518507, 29320310074027
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OFFSET
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0,1
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FORMULA
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O.g.f.: -(-2+3x)/[(-1+x)(-1+4x)]. a(n)=(1+5*4^n)/3. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 04 2008
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CROSSREFS
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Cf. A007583.
Sequence in context: A037381 A129013 A024429 this_sequence A026726 A026759 A005768
Adjacent sequences: A136409 A136410 A136411 this_sequence A136413 A136414 A136415
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KEYWORD
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nonn
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Mar 31 2008
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 04 2008
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