OFFSET
0,2
REFERENCES
P. de la Harpe, Topics in Geometric Group Theory, Univ. Chicago Press, 2000, p. 160, Sigma(Gamma_11, S_11; z).
LINKS
Colin Barker, Table of n, a(n) for n = 0..600
Index entries for linear recurrences with constant coefficients, signature (43,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-43,1).
FORMULA
G.f.: (1+x)*(1-x^22)/(1-43*x+43*x^22-x^23).
MATHEMATICA
CoefficientList[Series[(1+x)(1-x^22)/(1-43x+43x^22-x^23), {x, 0, 30}], x] (* Harvey P. Dale, Aug 16 2011 *)
PROG
(PARI) Vec((1+x)*(1-x^22)/(1-43*x+43*x^22-x^23)+O(x^99)) \\ Charles R Greathouse IV, Jul 01 2013
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Aug 21 2001
STATUS
approved