# A176958 (b-file synthesized from sequence entry)
0 1
1 5
2 7
3 35
4 135
5 663
6 3159
7 16055
8 82423
9 434247
10 2317623
11 12547975
12 68644919
13 379136007
14 2110601527
15 11832031495
16 66734423095
17 378429810183
18 2156265145143
19 12339184691207
20 70884648719415
21 408640406413319