# A067416 (b-file synthesized from sequence entry)
0 1
1 10
2 180
3 3240
4 58320
5 1049760
6 18895680
7 340122240
8 6122200320
9 110199605760
10 1983592903680
11 35704672266240
12 642684100792320
13 11568313814261760
14 208229648656711680
15 3748133675820810240