# A147160 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 9
9 25
10 53
11 97
12 275
13 939
14 2977
15 11455
16 54387
17 273381
18 1565737
19 8740687
20 56416565
21 398132663