# A150153 (b-file synthesized from sequence entry)
0 1
1 2
2 6
3 20
4 74
5 286
6 1156
7 4802
8 20424
9 88416
10 388558
11 1728154
12 7766068
13 35203756
14 160780734
15 739100904
16 3417064694
17 15877515930
18 74106064750
19 347262568828
20 1633119402146
21 7705187224014
22 36460485042190
23 172989825363820
24 822769665651888
25 3921997461962730
26 18733952939668598
27 89655251453676982