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Search: id:A063817
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| A063817 |
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Growth series for fundamental group of orientable closed surface of genus 7. |
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+0
1
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| 1, 28, 756, 20412, 551124, 14880348, 401769396, 10847773692, 292889889684, 7908027021468, 213516729579636, 5764951698650172, 155653695863554644, 4202649788315975388, 113471544284531335448, 3063731695682346056340
(list; graph; listen)
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OFFSET
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0,2
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REFERENCES
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P. de la Harpe, Topics in Geometric Group Theory, Univ. Chicago Press, 2000, p. 160, Sigma(Gamma_7, S_7; z).
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FORMULA
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G.f.: (1+x)*(1-x^14)/(1-27*x+27*x^14-x^15).
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CROSSREFS
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Sequence in context: A004293 A012808 A097834 this_sequence A152127 A113532 A158545
Adjacent sequences: A063814 A063815 A063816 this_sequence A063818 A063819 A063820
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Aug 21 2001
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