OFFSET
0,3
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
FORMULA
a(n) = floor(sqrt(binomial(2*n,n))).
MATHEMATICA
Table[Floor[Sqrt[Binomial[2n, n]]], {n, 0, 100}]
PROG
(Maxima) makelist(floor(sqrt(binomial(2*n, n))), n, 0, 24);
(Magma) [Floor(Sqrt(Binomial(2*n, n))): n in [0..40]]; // Vincenzo Librandi, Apr 01 2012
(PARI) a(n) = sqrtint(binomial(2*n, n)) \\ Jason Yuen, Oct 21 2024
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Emanuele Munarini, Jul 07 2011
STATUS
approved