# A006719 (b-file synthesized from sequence entry)
1 3
2 4
3 6
4 12
5 48
6 924
7 409620
8 83763206256
9 3508125906290858798172
10 6153473687096578758448522809275077520433168
11 18932619208894981833333582059033329370801266249535902023330546944758507753065602135844