8074762

Appears in sequences

• a(n) = [ C(2n,n)/n^2 ].at n=16A024500
• a(n) = (binomial(2*p,p)-2)/p^2 where p = prime(n).at n=6A060842
• a(n) = (1/n^2) * Sum_{d|n} moebius(n/d)*binomial(2*d,d).at n=16A268619