# A149867 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 13
4 40
5 134
6 467
7 1681
8 6230
9 23698
10 91781
11 361474
12 1444421
13 5838953
14 23855627
15 98385021
16 409057415
17 1713260510
18 7223645090
19 30637979060
20 130649823315
21 559905201444
22 2410332888720
23 10419393878406
24 45214717684925
25 196904962166692
26 860326758933089
27 3770559907597927
28 16572613244060271