# A365602 (b-file synthesized from sequence entry)
0 1
1 3
2 21
3 246
4 3990
5 82800
6 2092560
7 62343600
8 2139137760
9 83064002160
10 3600715721040
11 172353630085920
12 9028586395211040
13 513740204261763840
14 31553316959017737600
15 2080500578006553619200
16 146577866381052082876800
17 10988979300484733769667200