# A100396 (b-file synthesized from sequence entry)
0 1
1 2
2 2
3 4
4 8
5 20
6 60
7 216
8 898
9 4174
10 21202
11 116064
12 678714
13 4213830
14 27644814
15 190899932
16 1382959532
17 10480143744
18 82864872388
19 682076810340
20 5832742211822
21 51724158246318
22 474869816174462
23 4506715738475980