# A147488 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 1
5 1
6 5
7 20
8 49
9 167
10 643
11 3053
12 16577
13 118904
14 896633
15 8867027
16 91561000
17 1224859380
18 17454229913