# A187442 (b-file synthesized from sequence entry)
0 1
1 3
2 20
3 126
4 924
5 6435
6 48620
7 352716
8 2704156
9 20058300
10 155117520
11 1166803110
12 9075135300
13 68923264410
14 538257874440
15 4116715363800
16 32247603683100
17 247959266474052
18 1946939425648112
19 15033633249770520
20 118264581564861424