# A149870 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 13
4 42
5 138
6 482
7 1674
8 6193
9 22905
10 87142
11 331804
12 1297850
13 5080751
14 20167345
15 80358260
16 324330890
17 1312019214
18 5346985706
19 21886646737
20 90188575104
21 372646373051
22 1546658755002
23 6444345902094
24 26956040541657
25 113039384227922
26 475510150048488
27 2006521895619724
28 8488924958535221