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A135926 G.f.: C_{2,o}(y) - see p. 158 of Fan reference. 1
3, 14, 57, 235, 969, 4014, 16695, 69678, 291609, 1223060, 5138488, 21617717, 91044538, 383775880, 1618868769, 6832842691, 28853864329, 121894728098, 515129513163, 2177588642423, 9207559005080, 38940990014941, 164721537694077, 696889444599910 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

REFERENCES

C. K. Fan, Structure of a Hecke algebra quotient, J. Amer. Math. Soc., 10 (1997), 139-167. [See D(y) on p. 158.]

LINKS

Table of n, a(n) for n=0..23.

MAPLE

S:=sqrt(1 - 4*y);

Dy:=(y^2 + y - 1)*(1 + 2*y + S)*(1 - 5*y + 2*y^2 + (3*y - 1)*S)^2*( - 1 + 3*y + 2*y^2 + (1 - y)*S);

C:=(-8/Dy)*(6 - 77*y + 352*y^2 - 650*y^3 + 293*y^4 + 338*y^5 - 249*y^6 - 3*y^7 + 2*y^8 + ( - 6 + 65*y - 234*y^2 + 288*y^3 + 15*y^4 - 186*y^5 + 41*y^6 + 5*y^7)*S);

CROSSREFS

Cf. A135925.

Sequence in context: A052412 A037793 A037093 * A015523 A127363 A133444

Adjacent sequences:  A135923 A135924 A135925 * A135927 A135928 A135929

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Mar 09 2008

STATUS

approved

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Last modified May 31 07:22 EDT 2020. Contains 334747 sequences. (Running on oeis4.)