# A148890 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 8
4 31
5 99
6 405
7 1419
8 5953
9 22065
10 96413
11 370294
12 1634168
13 6465684
14 28845552
15 116211498
16 525501390
17 2151401160
18 9780421638
19 40586651280
20 185562016495
21 777580903830
22 3577734848131
23 15126428257970
24 69843964271976
25 297606647531008
26 1378863798686027
27 5911859813254132
28 27491122663909053