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A063822 Growth series for fundamental group of orientable closed surface of genus 12. 0
1, 48, 2256, 106032, 4983504, 234224688, 11008560336, 517402335792, 24317909782224, 1142941759764528, 53718262708932816, 2524758347319842352, 118663642324032590544, 5577191189229531755568, 262127985893787992511696, 12320015337008035648049712 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

P. de la Harpe, Topics in Geometric Group Theory, Univ. Chicago Press, 2000, p. 160, Sigma(Gamma_12, S_12; z).

LINKS

Table of n, a(n) for n=0..15.

FORMULA

G.f.: (1+x)*(1-x^24)/(1-47*x+47*x^24-x^25).

CROSSREFS

Sequence in context: A170633 A170681 A170729 * A170767 A218750 A263504

Adjacent sequences:  A063819 A063820 A063821 * A063823 A063824 A063825

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Aug 21 2001

STATUS

approved

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Last modified April 25 21:06 EDT 2019. Contains 322461 sequences. (Running on oeis4.)