OFFSET
0,2
COMMENTS
See A145564 for the numerators, a reference and a W. Lang link.
FORMULA
a(n)=denominator(r(n)), with the rationals (in lowest terms) r(n):=sum(1/(binomial(2*k,k)*(k+1)),k=0..n).
EXAMPLE
Rationals r(n) (in lowest terms):[1, 5/4, 47/36, 949/720, 33287/25200, 14273/10800, 7694047/5821200,...].
CROSSREFS
KEYWORD
nonn,frac,easy
AUTHOR
Wolfdieter Lang, Oct 17 2008
STATUS
approved