OFFSET
0,2
LINKS
Michael Anshelevich, Product formulas on posets, Wick products, and a correction for the q-Poisson process, arXiv:1708.08034 [math.OA], 2017.
MAPLE
R:=z->(1-z-(z+1)*sqrt(1-4*z))/(2*z^2);
m:=z->(3-z-sqrt(1-6*z+z^2))/2;
M:=z->1/(1-z*R(z*m(z)));
series(M(z), z, 40);
seriestolist(%);
MATHEMATICA
R[z_] := (1 - z - (z + 1) Sqrt[1 - 4 z])/(2 z^2); m[z_] := (3 - z - Sqrt[1 - 6 z + z^2])/2; CoefficientList[Series[1/(1 - z R[z m[z]]), {z, 0, 24}], z] (* Michael De Vlieger, Feb 17 2018 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Feb 17 2018
STATUS
approved