# A328186 (b-file synthesized from sequence entry)
1 1
2 1
3 6
4 6
5 120
6 360
7 5040
8 2520
9 72576
10 1814400
11 39916800
12 59875200
13 1245404160
14 21794572800
15 1307674368000
16 81729648000
17 71137485619200
18 3201186852864000
19 121645100408832000
20 12164510040883200
21 10218188434341888000
22 281000181944401920000
23 25852016738884976640000