# A089066 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 3
5 8
6 38
7 192
8 1320
9 10176
10 91296
11 908160
12 9985920
13 119761920
14 1556847360
15 21794734080
16 326920043520
17 5230700052480
18 88921882828800
19 1600593472880640
20 30411275613143040
21 608225502973132800