OFFSET
0,2
MAPLE
a:= n-> (l-> add(1/j, j=l)*ilcm(l[]))([seq(binomial(2*i, i), i=0..n)]):
seq(a(n), n=0..22); # Alois P. Heinz, Sep 04 2019
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
a(7) corrected by Sean A. Irvine, Sep 04 2019
STATUS
approved