# A213449 (b-file synthesized from sequence entry)
0 1
1 12
2 240
3 4032
4 34560
5 101376
6 50319360
7 6635520
8 451215360
9 42361159680
10 1471492915200
11 1758147379200
12 417368899584000
13 15410543984640
14 141874849382400
15 28026642660065280
16 922166952040857600
17 19725496300339200
18 2163255728265599385600
19 36926129074234982400