# A090374 (b-file synthesized from sequence entry)
1 1
2 10
3 160
4 3200
5 72960
6 1813504
7 47923200
8 1325629440
9 37991219200
10 1120005652480
11 33789432561664
12 1039157228994560
13 32480974549811200
14 1029463445864448000
15 33023079530417356800
16 1070513886720329515008
17 35026358912891580579840
18 1155516042520241436098560