96768000domain: NAppears in sequencesa(n) = n!*(3*n^2 - 15*n + 10)/6.at n=6A034861a(n) = n!*(3*n^2 - 15*n + 10)/6, n > 4.at n=6A034862A077175(n) / A077176(n).at n=11A100918A101177(n) / A101178(n).at n=11A101179