# A148871 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 8
4 29
5 95
6 352
7 1317
8 5178
9 20231
10 81681
11 334624
12 1385975
13 5778504
14 24432650
15 104130924
16 445996034
17 1923136631
18 8353882501
19 36444183670
20 159607590184
21 702556782360
22 3105431408159
23 13766270203412
24 61226929138240
25 273267155552114
26 1222860642385854
27 5485030439556647
28 24667732138034939