# A055070 (b-file synthesized from sequence entry)
1 0
2 0
3 9
4 80
5 900
6 12348
7 200704
8 3779136
9 81000000
10 1948717100
11 52027785216
12 1527047909712
13 48884036690944
14 1695352148437500
15 63331869759897600
16 2535571976423919872
17 108321063231221415936
18 4918685157679434648876