# A005227 (b-file synthesized from sequence entry)
0 0
1 1
2 1
3 2
4 4
5 6
6 19
7 20
8 111
9 116
10 567
11 641
12 4718
13 4772
14 35489
15 46012
16 389277
17 487408
18 4616580