# A221161 (b-file synthesized from sequence entry)
0 1
1 7
2 72
3 1056
4 19968
5 460800
6 12533760
7 392232960
8 13872660480
9 546979184640
10 23781703680000
11 1130106558873600
12 58263271479705600
13 3238634262940876800
14 193064390900475494400
15 12285915784575713280000
16 831229959367865401344000
17 59578968979556190388224000