login
A192672
Floor-Sqrt transform of little Schroeder numbers (A001003).
0
1, 1, 1, 3, 6, 14, 30, 65, 144, 321, 720, 1626, 3694, 8428, 19305, 44371, 102291, 236450, 547868, 1272148, 2959613, 6897450, 16100184, 37635909, 88095027, 206458158, 484399704, 1137707979, 2674734202, 6293966627, 14823002101, 34937537185, 82408390392, 194515481823
OFFSET
0,4
FORMULA
a(n) = floor(sqrt(littleSchroder(n))).
MATHEMATICA
FSFromSeries[f_, x_, n_] := Map[Floor[Sqrt[#]]&, CoefficientList[Series[f, {x, 0, n}], x]]
FSFromSeries[(1+x-Sqrt[1-6x+x^2])/(4x), x, 100]
CROSSREFS
Sequence in context: A077067 A083797 A308580 * A175656 A196450 A131244
KEYWORD
nonn
AUTHOR
Emanuele Munarini, Jul 07 2011
STATUS
approved