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Search: id:A130845
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A130845 a(n) = a(n+1) = a(n+2) = A001477, a(n+3) = A005408. +0
3
0, 0, 0, 1, 1, 1, 1, 3, 2, 2, 2, 5, 3, 3, 3, 7, 4, 4, 4, 9, 5, 5, 5, 11, 6, 6, 6, 13, 7, 7, 7, 15, 8, 8, 8, 17, 9, 9, 9, 19, 10, 10, 10, 21, 11, 11, 11, 23, 12, 12, 12, 25, 13, 13, 13, 27, 14, 14, 14, 29, 15, 15, 15, 31, 16, 16, 16, 33, 17, 17, 17 (list; graph; listen)
OFFSET

0,8

FORMULA

O.g.f.: x^3(1+x+x^2+x^3+x^4)/((1-x)^2*(1+x)^2*(1+x^2)^2). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 22 2008]

CROSSREFS

Sequence in context: A024703 A102845 A064126 this_sequence A134653 A090207 A065437

Adjacent sequences: A130842 A130843 A130844 this_sequence A130846 A130847 A130848

KEYWORD

nonn

AUTHOR

Paul Curtz (bpcrtz(AT)free.fr), Jul 20 2007

EXTENSIONS

Edited by N. J. A. Sloane (njas(AT)research.att.com), Sep 28 2007

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.


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