# A081993 (b-file synthesized from sequence entry)
1 1
2 55
3 3330
4 5833350
5 11199999998880
6 642096000000065520
7 84083999999999159160
8 853092240000000006366360
9 21033492480000000001383782400
10 181960466688000000000107035568640