# A167888 (b-file synthesized from sequence entry)
1 1
2 4
3 216
4 248832
5 612220032
6 78310985281
7 19683000000000
8 4808584372417849
9 717368321110468608
10 5460999706120583177327
11 1379946262057143768386569
12 470184984576000000000000000
13 164890958756244164895763202881