# A093458 (b-file synthesized from sequence entry)
0 1
1 2
2 8
3 24
4 144
5 720
6 5760
7 40320
8 362880
9 3991680
10 39916800
11 518918400
12 6227020800
13 105859353600
14 1482030950400
15 28158588057600
16 422378820864000
17 9714712879872000
18 155435406077952000
19 4507626776260608000