# A149651 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 15
4 73
5 249
6 1225
7 4587
8 22713
9 89435
10 444383
11 1807377
12 8999213
13 37450959
14 186719083
15 790438487
16 3944246321
17 16919418543
18 84475250599
19 366211164923
20 1829137312155
21 7998183162949
22 39960043633709
23 175990569754261
24 879446983886669
25 3896847386324279
26 19475820051402299
27 86749210466241199