# A128811 (b-file synthesized from sequence entry)
1 1
2 4
3 35
4 240
5 3003
6 26880
7 415701
8 4435200
9 79676025
10 968647680
11 19535112675
12 263472168960
13 5837993287875
14 85816649318400
15 2058476433304725
16 32567418416332800
17 836589039864843825
18 14112547980410880000