# A049222 (b-file synthesized from sequence entry)
1 0
2 0
3 0
4 1
5 4
6 13
7 41
8 130
9 415
10 1329
11 4260
12 13657
13 43781
14 140346
15 449891
16 1442157
17 4622932
18 14819125
19 47503729
20 152276498
21 488132887
22 1564743865
23 5015895108
24 16078800033
25 51541709869
26 165220529546
27 529625878779
28 1697752526549