# A214770 (b-file synthesized from sequence entry)
1 1
2 2
3 12
4 120
5 1680
6 30232
7 664832
8 17277120
9 518031360
10 17602865312
11 668505311232
12 28059791760000
13 1289932186583040
14 64455076284318592
15 3478305412257677312
16 201608948937441269760
17 12491465252403224248320
18 823886511479340063068672
19 57633367371058675735068672