5170584

Appears in sequences

• a(n) = n!/(k!)^2, where k is the largest number such that (k!)^2 divides n!.at n=28A056042
• a(n) = ceiling(binomial(2*n-1,n-1)/n).at n=14A188669
• Numerator of binomial(2n,n)/(2n).at n=14A201058