# A165641 (b-file synthesized from sequence entry)
0 1
1 1
2 6
3 6
4 360
5 360
6 15120
7 15120
8 1814400
9 1814400
10 119750400
11 119750400
12 653837184000
13 653837184000
14 3923023104000
15 3923023104000
16 16005934264320000
17 16005934264320000
18 12772735542927360000
19 12772735542927360000
20 8430005458332057600000
21 8430005458332057600000