# A147018 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 1
5 5
6 9
7 21
8 35
9 177
10 589
11 4235
12 15969
13 164553
14 879607
15 12456629
16 97189937
17 1947709409
18 20669429409