# A197657 (b-file synthesized from sequence entry)
0 1
1 4
2 22
3 134
4 866
5 5812
6 40048
7 281374
8 2006698
9 14482064
10 105527060
11 775113440
12 5731756720
13 42628923040
14 318621793472
15 2391808860446
16 18023208400634
17 136271601087352
18 1033449449559724
19 7858699302115444
20 59906766929537116
21 457685157123172664