# A014704 (b-file synthesized from sequence entry)
0 1
1 72
2 2400
3 52576
4 870732
5 11739984
6 134825216
7 1359259200
8 12290396058
9 101268020984
10 769721861376
11 5449376818656
12 36216000728200
13 227395735413552
14 1356190070338560
15 7717657198319936
16 42069113073665703
17 220400042813587800