# A148975 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 9
4 32
5 107
6 406
7 1543
8 6090
9 24146
10 98643
11 406416
12 1695798
13 7137445
14 30371510
15 130114585
16 561109001
17 2434945076
18 10628079754
19 46605896147
20 205271832088
21 907951122880
22 4031163410729
23 17957103579357
24 80244610168837
25 359663685481550
26 1616386069956481
27 7282307288193565
28 32886927632112087