1937520domain: NAppears in sequencesa(n) = (5n+1)*C(4n,n)/(3n+1).at n=7A052204a(n) = (n + 4)*(n + 3)*(n + 2)*(n + 1)*n / 5 = 24*A000389(n+4).at n=23A158874Number of arrangements of n indistinguishable balls in n boxes with the maximum number of balls in any box equal to n-5.at n=18A180295