# A201640 (b-file synthesized from sequence entry)
1 1
2 8
3 54
4 368
5 2550
6 17952
7 128086
8 924128
9 6729858
10 49395440
11 364979560
12 2712343680
13 20257516240
14 151957919232
15 1144281700110
16 8646263301056
17 65531851263978
18 498047725561104
19 3794627850238756
20 28976634967413920
21 221728252767064596
22 1699859618636556608