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A063817 Growth series for fundamental group of orientable closed surface of genus 7. 0
1, 28, 756, 20412, 551124, 14880348, 401769396, 10847773692, 292889889684, 7908027021468, 213516729579636, 5764951698650172, 155653695863554644, 4202649788315975388, 113471544284531335448, 3063731695682346056340 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

REFERENCES

P. de la Harpe, Topics in Geometric Group Theory, Univ. Chicago Press, 2000, p. 160, Sigma(Gamma_7, S_7; z).

FORMULA

G.f.: (1+x)*(1-x^14)/(1-27*x+27*x^14-x^15).

CROSSREFS

Sequence in context: A166615 A167081 A167235 * A167699 A167943 A168705

Adjacent sequences:  A063814 A063815 A063816 * A063818 A063819 A063820

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Aug 21 2001

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Last modified February 17 11:46 EST 2012. Contains 206011 sequences.