62852101650domain: NAppears in sequencesa(n) = binomial(5*n,2*n).at n=8A001450Binomial coefficient C(2n,n-4).at n=16A004310Binomial coefficient C(40,n).at n=16A010956a(n) = binomial(n,16).at n=24A010969a(n) = binomial coefficient C(n,24).at n=16A010977a(n) = binomial(phi(n+1),phi(n)).at n=39A078503