# A153233 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 27
4 157
5 957
6 6025
7 38847
8 255161
9 1701297
10 11485549
11 78362091
12 539518389
13 3744085725
14 26164480017
15 183976884639
16 1300803253617
17 9242988233025
18 65971342007125
19 472779083030619
20 3400653965846093
21 24543058771387485
22 177678278627756185