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Search: id:A063814
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| A063814 |
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Growth series for fundamental group of orientable closed surface of genus 4. |
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+0
1
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| 1, 16, 240, 3600, 54000, 810000, 12150000, 182250000, 2733749984, 41006249520, 615093739216, 9226406034480, 138396089710800, 2075941333566000, 31139119822050000, 467086794609150000, 7006301878313250240, 105094527562338760784, 1576417904249681573040
(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_4, S_4; z).
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FORMULA
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G.f.: (1+x)*(1-x^8)/(1-15*x+15*x^8-x^9).
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CROSSREFS
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Sequence in context: A060198 A097829 A010559 this_sequence A058667 A005619 A135518
Adjacent sequences: A063811 A063812 A063813 this_sequence A063815 A063816 A063817
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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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