6336512domain: NAppears in sequencesa(n) = 2^(n-4)*(n+2)*(n+3)*(n+4)*(n+5)*(n+6)/15.at n=11A080952a(n) = (1/n!) * (7*n)!/(7*n/2)! * (5*n/2)!/(5*n)!.at n=5A262733