%I #3 Mar 30 2012 16:50:47

%S 3,14,57,235,969,4014,16695,69678,291609,1223060,5138488,21617717,

%T 91044538,383775880,1618868769,6832842691,28853864329,121894728098,

%U 515129513163,2177588642423,9207559005080,38940990014941,164721537694077,696889444599910

%N G.f.: C_{2,o}(y) - see p. 158 of Fan reference.

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

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

%p 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);

%p 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);

%Y Cf. A135925.

%K nonn

%O 0,1

%A _N. J. A. Sloane_, Mar 09 2008