# A113248 (b-file synthesized from sequence entry)
0 0
1 0
2 2
3 8
4 56
5 336
6 2496
7 19968
8 181248
9 1812480
10 19956480
11 239477760
12 3113487360
13 43588823040
14 653836861440
15 10461389783040
16 177843708887040
17 3201186759966720
18 60822550111518720
19 1216451002230374400