# A132868 (b-file synthesized from sequence entry)
0 1
1 3
2 7
3 20
4 60
5 182
6 547
7 1641
8 4921
9 14762
10 44286
11 132860
12 398581
13 1195743
14 3587227
15 10761680
16 32285040
17 96855122
18 290565367
19 871696101
20 2615088301
21 7845264902
22 23535794706
23 70607384120
24 211822152361
25 635466457083
26 1906399371247
27 5719198113740