OFFSET
0,2
LINKS
T. D. Noe, Table of n, a(n) for n = 0..400
FORMULA
A093526(n) = a(n+1)/(n+2).
a(n) = numerator(C(2n,n)/n). - Enrique Pérez Herrero, Mar 26 2012
Sum_{n>=0} A093527(n)/a(n+1) = Sum_{n>=1} n/binomial(2*n,n) = 2/3 + 2*Pi/(9*sqrt(3)) (A145429). - Amiram Eldar, Jan 26 2022
a(n) = numerator((n + 1)*binomial(2*n+1, n)/(n*(2*n + 1))) for n > 0. - Stefano Spezia, Aug 06 2022
MAPLE
A195686 := n -> binomial(2*n, n)/igcd(n, binomial(2*n, n));
MATHEMATICA
a[n_] := Numerator[Binomial[2n, n]/n]; Join[{1}, Table[a[n], {n, 100}]] (* Enrique Pérez Herrero, Mar 26 2012 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Peter Luschny, Oct 06 2011
STATUS
approved