OFFSET
0,4
FORMULA
a(n) = floor(sqrt(Motzkin(n))).
MATHEMATICA
FSFromSeries[f_, x_, n_] := Map[Floor[Sqrt[#]]&, CoefficientList[Series[f, {x, 0, n}], x]]
FSFromSeries[(1-x-Sqrt[1-2x-3x^2])/(2x^2), x, 100]
CROSSREFS
KEYWORD
nonn
AUTHOR
Emanuele Munarini, Jul 07 2011
STATUS
approved