# A012791 (b-file synthesized from sequence entry)
0 1
1 6
2 148
3 9184
4 1066640
5 199000736
6 54431471040
7 20523724218880
8 10203766053312768
9 6467780044492713472
10 5090997086675585360896
11 4871968356294907783585792
12 5570589015199967686042095616