886322710domain: NAppears in sequencesa(n) = binomial coefficient C(n,45).at n=8A010998Binomial coefficients C(53,n).at n=8A017769Binomial coefficients C(2*n-7,8).at n=22A053130a(n) = 9*binomial(5*n+9, n)/(5*n+9).at n=9A233737