# A149992 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 17
4 57
5 207
6 770
7 2956
8 11511
9 45389
10 181551
11 732140
12 2975463
13 12172039
14 50107475
15 207221750
16 860713442
17 3589342898
18 15020205470
19 63043294686
20 265353326080
21 1119765415144
22 4736096978950
23 20073601677112
24 85247397615355
25 362674562863687
26 1545498849494243
27 6596146668760089