# A107713 (b-file synthesized from sequence entry)
0 1
1 3
2 12
3 66
4 484
5 4536
6 52128
7 709776
8 11153376
9 198339840
10 3932962560
11 85976743680
12 2053285148160
13 53173906652160
14 1483987541299200
15 44396218792396800
16 1417294759310438400
17 48088097391133900800
18 1728013936221838540800
19 65558270633421791232000