# A147496 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 1
5 5
6 9
7 25
8 45
9 145
10 605
11 4313
12 20593
13 130161
14 816717
15 6861977
16 63223597
17 879585069
18 10212102803