# A013150 (b-file synthesized from sequence entry)
0 1
1 4
2 48
3 1344
4 71680
5 6134144
6 766639104
7 132845576192
8 30189756186624
9 8791995173601280
10 3164834039610834944
11 1391075516277863612416
12 727593505575051704926208
13 449845963881833812549697536