OFFSET
0,4
LINKS
Paolo Xausa, Table of n, a(n) for n = 0..10000
FORMULA
a(n) = numerator((n+1)*binomial(n, 2)/binomial(2*n, n));
a(n) = numerator((n-1)*n*(n+1)/(2*binomial(2*n, n))).
MATHEMATICA
Table[Numerator[n*(n^2 - 1)/(2*Binomial[2*n, n])], {n, 0, 100}] (* Paolo Xausa, Aug 30 2024 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Sep 11 2004
STATUS
approved