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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

LINKS

Table of n, a(n) for n=0..43.

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: A217067 A014214 A094993 * A080239 A114323 A293631

Adjacent sequences:  A192668 A192669 A192670 * A192672 A192673 A192674

KEYWORD

nonn

AUTHOR

Emanuele Munarini, Jul 07 2011

STATUS

approved

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Last modified November 18 12:35 EST 2019. Contains 329261 sequences. (Running on oeis4.)