# A227713 (b-file synthesized from sequence entry)
0 1
1 9
2 90
3 836
4 6856
5 49787
6 326618
7 1977322
8 11244976
9 60908337
10 317509874
11 1605448440
12 7920487752
13 38297112551
14 182108066522
15 853884638758
16 3956279351760
17 18143381822941
18 82466719670866
19 371917534537524
20 1665777832832136
21 7415146800493139