# A047069 (b-file synthesized from sequence entry)
0 1
1 2
2 9
3 50
4 292
5 1757
6 10809
7 67473
8 425711
9 2707757
10 17332058
11 111508304
12 720429774
13 4670990039
14 30375989547
15 198050065342
16 1294186149138
17 8473767434587
18 55579644024480
19 365116858320540
20 2401901294047629
21 15820713708790749
22 104326220133691996