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A063816 Growth series for fundamental group of orientable closed surface of genus 6. 1
1, 24, 552, 12696, 292008, 6716184, 154472232, 3552861336, 81715810728, 1879463646744, 43227663875112, 994236269127576, 22867434189934224, 525950986368486600, 12096872686475179128, 278228071788928828488 (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_6, S_6; z).

LINKS

Colin Barker, Table of n, a(n) for n = 0..700

Index entries for linear recurrences with constant coefficients, signature (23,0,0,0,0,0,0,0,0,0,0,-23,1).

FORMULA

G.f.: (1+x)*(1-x^12)/(1-23*x+23*x^12-x^13).

a(n) = 23*a(n-1) - 23*a(n-12) + a(n-13) for n>13. - Colin Barker, Jun 13 2019

PROG

(PARI) Vec((1+x)*(1-x^12)/(1-23*x+23*x^12-x^13) + O(x^20)) \\ Colin Barker, Jun 13 2019

CROSSREFS

Sequence in context: A165965 A166418 A166611 * A167077 A167183 A167695

Adjacent sequences:  A063813 A063814 A063815 * A063817 A063818 A063819

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Aug 21 2001

STATUS

approved

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Last modified October 16 07:30 EDT 2019. Contains 328051 sequences. (Running on oeis4.)