# A149499 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 9
4 45
5 109
6 545
7 1553
8 7765
9 24117
10 120585
11 396969
12 1984845
13 6813153
14 34065765
15 120666321
16 603331605
17 2190578173
18 10952890865
19 40569468449
20 202847342245
21 763846716897
22 3819233584485
23 14583041787425
24 72915208937125
25 281740598296225
26 1408702991481125
27 5499437584957425
28 27497187924787125