# A003808 (b-file synthesized from sequence entry)
1 20160
2 6065280
3 987033600
4 7254000000
5 2317591180800
6 34558531338240
7 50759843097600
8 2069665112592000
9 12714519233969280
10 1148120010326016000
11 712975930219192320
12 7568375355962524800