# A221160 (b-file synthesized from sequence entry)
0 1
1 5
2 56
3 864
4 16896
5 399360
6 11059200
7 350945280
8 12551454720
9 499415777280
10 21879167385600
11 1046394961920000
12 54245114825932800
13 3029690116944691200
14 181363518724689100800
15 11583863454028529664000
16 786298610212845649920000
17 56523637237014847291392000