# A148615 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 6
4 21
5 55
6 216
7 659
8 2773
9 9274
10 40660
11 144482
12 650821
13 2415406
14 11092583
15 42543680
16 198221801
17 780032966
18 3674928118
19 14762312411
20 70157373141
21 286612381208
22 1371638239237
23 5682633709809
24 27349812752792
25 114658455891289
26 554420794389554
27 2347945946536543
28 11397643763639976