# A160537 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 3
4 0
5 0
6 90
7 63
8 0
9 8880
10 22680
11 49203
12 2118600
13 12383280
14 60540480
15 1131841623
16 10857974400
17 87893114400
18 1246674306240
19 15590737021923
20 175749917616000
21 2471071936993440
22 35757593223327360
23 502589340005210703