# A144278 (b-file synthesized from sequence entry)
0 1
1 2
2 14
3 108
4 1180
5 15400
6 255400
7 4888960
8 109951360
9 2793984000
10 79855107200
11 2522981120000
12 87503244928000
13 3299660415744000
14 134477619593856000
15 5887149103503360000
16 275541626811601920000
17 13727736328568199168000
18 725335510624740370432000