# A091019 (b-file synthesized from sequence entry)
0 1
1 12
2 160
3 896
4 18432
5 90112
6 851968
7 1310720
8 142606336
9 637534208
10 5637144576
11 24696061952
12 429496729600
13 1855425871872
14 15942918602752
15 68169720922112
16 1548112371908608
17 3940649673949184
18 166633186212708352