# A038748 (b-file synthesized from sequence entry)
1 0
2 0
3 1
4 7
5 36
6 168
7 736
8 3151
9 13190
10 54938
11 226597
12 934200
13 3831219
14 15723801
15 64313623
16 263316219
17 1075420890
18 4396310382
19 17937457304
20 73247306563
21 298635873550
22 1218428664338