# A148467 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 19
5 63
6 228
7 849
8 3279
9 12970
10 52391
11 215143
12 896069
13 3776720
14 16080646
15 69082912
16 299088374
17 1303775401
18 5718074120
19 25214654439
20 111731999692
21 497294169489
22 2222212374035
23 9966362357271
24 44846949907442
25 202420181884867
26 916209119602653
27 4157777698180396
28 18913437500393274