# A149868 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 13
4 41
5 139
6 494
7 1771
8 6626
9 25477
10 99704
11 394028
12 1583784
13 6453726
14 26532762
15 109902780
16 459422070
17 1935495454
18 8199912534
19 34928922249
20 149648443966
21 644305507731
22 2785129360112
23 12087444079695
24 52667440706104
25 230264645786360
26 1009771676888315
27 4441475020721976
28 19591818756938375