# A075510 (b-file synthesized from sequence entry)
0 1
1 30
2 560
3 8400
4 111216
5 1360800
6 15790720
7 176563200
8 1922176256
9 20518417920
10 215825326080
11 2244998246400
12 23153670762496
13 237224718704640
14 2418102840688640
15 24549985173504000
16 248464183682727936