# A037484 (b-file synthesized from sequence entry)
1 1
2 9
3 64
4 450
5 3151
6 22059
7 154414
8 1080900
9 7566301
10 52964109
11 370748764
12 2595241350
13 18166689451
14 127166826159
15 890167783114
16 6231174481800
17 43618221372601
18 305327549608209
19 2137292847257464