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A147622 G.f.: 1/(1 - x - 2 x^2 + x^3 + x^4 + 2 x^7 - 5 x^9 + 2 x^11 + x^14 + x^15 - 2 x^16 - x^17 + x^18). 0
1, 1, 3, 4, 8, 12, 21, 31, 51, 79, 126, 199, 315, 500, 794, 1265, 2009, 3202, 5090, 8108, 12898, 20533, 32667, 51990, 82721, 131631, 209446, 333263, 530282, 843764, 1342587, 2136280, 3399227, 5408765, 8606368, 13694288, 21790171, 34672157 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..37.

MATHEMATICA

f[x_] =-1 + x^2 - x^7 - x^8 + x^9; g[x] = ExpandAll[ -f[x]*x^9*f[1/x]]; a = Table[SeriesCoefficient[Series[1/g[x], {x, 0, 50}], n], {n, 0, 50}]

CROSSREFS

Sequence in context: A281612 A025034 A145722 * A173534 A074331 A052952

Adjacent sequences:  A147619 A147620 A147621 * A147623 A147624 A147625

KEYWORD

nonn

AUTHOR

Roger L. Bagula, Nov 08 2008

EXTENSIONS

Definition corrected by N. J. A. Sloane, Nov 09 2008

STATUS

approved

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Last modified March 22 01:06 EDT 2019. Contains 321406 sequences. (Running on oeis4.)