# A047032 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 10
4 34
5 121
6 441
7 1632
8 6101
9 22991
10 87193
11 332388
12 1272466
13 4888612
14 18837950
15 72779450
16 281815171
17 1093403995
18 4249702841
19 16543036314
20 64488251459
21 251706814417
22 983573894625
23 3847443056540
24 15064400023285