A192663 Floor-Sqrt transform of the binomial coefficients binomial(3*n,n) (A005809).

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

Offset: 0

Author

Emanuele Munarini, Jul 07 2011

Keywords

• nonn

Crossrefs

Cf. A005809.

Programs

Mathematica

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

Maxima

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

Formula

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