# A006548 (b-file synthesized from sequence entry)
1 0
2 24
3 480
4 40320
5 2903040
6 479001600
7 74724249600
8 20922789888000
9 5690998849536000
10 2432902008176640000
11 1021818843434188800000
12 620448401733239439360000
13 372269041039943663616000000