7766844470domain: NAppears in sequencesExpansion of (1+x)^50 * (1-x)/(1 - x^51).at n=10A173246a(n) = binomial(5*n,n)*(3*n+1)/(4*n+1).at n=10A215541Number of standard Young tableaux of shape [10n,10].at n=4A215550