# A003204 (b-file synthesized from sequence entry)
0 1
1 3
2 6
3 12
4 24
5 33
6 60
7 99
8 156
9 276
10 438
11 597
12 1134
13 1404
14 2904
15 3522
16 6876
17 7548
18 16680
19 18153
20 39846
21 41805