# A028918 (b-file synthesized from sequence entry)
1 3
2 252
3 113400
4 141523200
5 373621248000
6 1788898535424000
7 14050009097220096000
8 168600109166641152000000
9 2931618698189556350976000000
10 70886540122223472566599680000000
11 2306506242496907350372020387840000000
12 98312522080188178902256997011292160000000