# A061302 (b-file synthesized from sequence entry)
0 0
1 2
2 6
3 36
4 320
5 3750
6 54432
7 941192
8 18874368
9 430467210
10 11000000000
11 311249095212
12 9659108818944
13 326173191714734
14 11905721598812160
15 467086816406250000
16 19599665578316398592
17 875901453762003632658