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A192663 Floor-Sqrt transform of the binomial coefficients bin(3*n,n) (A005809). 0
1, 1, 3, 9, 22, 54, 136, 340, 857, 2164, 5481, 13911, 35379, 90124, 229913, 587254, 1501615, 3843314, 9845118, 25238541, 64744455, 166190960, 426829202, 1096784835, 2819620836, 7251796132, 18658280277, 48023738374, 123648031266, 318460151301, 820446813941 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..30.

FORMULA

a(n) = floor(sqrt(binomial(3*n,n))).

MATHEMATICA

Table[Floor[Sqrt[Binomial[3n, n]]], {n, 0, 100}]

PROG

(Maxima) makelist(floor(sqrt(binomial(3*n, n))), n, 0, 24);

CROSSREFS

Sequence in context: A305612 A202882 A054442 * A114697 A032284 A296582

Adjacent sequences:  A192660 A192661 A192662 * A192664 A192665 A192666

KEYWORD

nonn

AUTHOR

Emanuele Munarini, Jul 07 2011

STATUS

approved

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Last modified June 16 10:03 EDT 2019. Contains 324152 sequences. (Running on oeis4.)