# A371302 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 6
4 12
5 40
6 1620
7 13608
8 117600
9 2924640
10 49603680
11 782147520
12 19083936960
13 463369645440
14 10836652514688
15 304533583200000
16 9218842256332800
17 281872333420554240
18 9421579421176089600
19 338543319734116116480
20 12590519274541116518400