# A067746 (b-file synthesized from sequence entry)
1 1
2 24
3 19440
4 3670016
5 4500000000
6 255409127424
7 5159146026151936
8 4323455642275676160
9 18580248257778920521728
10 12451840000000000000000000
11 162954214196559334212035936256
12 319540863203713904815925769535488