# A187880 (b-file synthesized from sequence entry)
1 0
2 2
3 120
4 18624
5 9876480
6 20135116800
7 163839423283200
8 5348052945894113280
9 699612285096273924587520
10 366440137172271078986848665600
11 768105432116827516249785005978419200
12 6441762292785726797799215491828242028953600