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A192671
Floor-Sqrt transform of Riordan numbers (A005043).
0
1, 0, 1, 1, 1, 2, 3, 6, 9, 15, 24, 39, 64, 106, 174, 288, 476, 791, 1315, 2192, 3659, 6120, 10251, 17195, 28880, 48565, 81760, 137786, 232427, 392429, 663130, 1121446, 1897924, 3214257, 5447110, 9236757, 15672057, 26605536, 45190288, 76795140, 130565138, 222083192, 377911330, 643341150
OFFSET
0,6
FORMULA
a(n) = floor(sqrt(RiordanN(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(1+x)), x, 100]
CROSSREFS
Sequence in context: A014214 A094993 A365071 * A080239 A364755 A114323
KEYWORD
nonn
AUTHOR
Emanuele Munarini, Jul 07 2011
STATUS
approved