# A198916 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 23
4 158
5 1212
6 10058
7 88811
8 826982
9 8085950
10 82922624
11 893003234
12 10129641140
13 121552747370
14 1550460365622
15 21115793548491
16 308004022741254
17 4817224946243142
18 80703099826887368
19 1444218797390453282
20 27501426760092853796
21 554910390616969332656