# A007275 (b-file synthesized from sequence entry)
0 1
1 6
2 36
3 216
4 1296
5 7776
6 46440
7 276054
8 1633848
9 9633366
10 56616132
11 331847118
12 1940715960
13 11327957196
14 66010769382
15 384094025382
16 2231978658906