# A009668 (b-file synthesized from sequence entry)
0 1
1 4
2 32
3 432
4 10752
5 504832
6 35418112
7 3115462656
8 333569720320
9 44698511474688
10 7574890049699840
11 1575934549490139136
12 387157222106970718208
13 110017544405171642040320