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Search: id:A063819
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| A063819 |
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Growth series for fundamental group of orientable closed surface of genus 9. |
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+0
1
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| 1, 36, 1260, 44100, 1543500, 54022500, 1890787500, 66177562500, 2316214687500, 81067514062500, 2837362992187500, 99307704726562500, 3475769665429687500, 121651938290039062500, 4257817840151367187500, 149023624405297851562500
(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_9, S_9; z).
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FORMULA
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G.f.: (1+x)*(1-x^18)/(1-35*x+35*x^18-x^19).
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CROSSREFS
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Sequence in context: A001110 A064196 A060786 this_sequence A158700 A144128 A009980
Adjacent sequences: A063816 A063817 A063818 this_sequence A063820 A063821 A063822
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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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