OFFSET
0,2
FORMULA
a(n) = Sum_{k=0..n} floor(sqrt(binomial(2*k,k))).
MATHEMATICA
Table[Sum[Floor[Sqrt[Binomial[2k, k]]], {k, 0, n}], {n, 0, 100}]
PROG
(Maxima) makelist(sum(floor(sqrt(binomial(2*k, k))), k, 0, n), n, 0, 24);
CROSSREFS
KEYWORD
nonn
AUTHOR
Emanuele Munarini, Jul 07 2011
STATUS
approved