# A091032 (b-file synthesized from sequence entry)
2 1
3 60
4 5040
5 604800
6 99792000
7 21794572800
8 6102480384000
9 2134124568576000
10 912338253066240000
11 468333636574003200000
12 284372184127734743040000
13 201645730563302817792000000
14 165147853331345007771648000000