# A212158 (b-file synthesized from sequence entry)
2 1
3 2
4 6
5 120
6 720
7 40320
8 362880
9 39916800
10 87178291200
11 1307674368000
12 6402373705728000
13 2432902008176640000
14 51090942171709440000
15 25852016738884976640000
16 403291461126605635584000000
17 8841761993739701954543616000000