# A149878 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 14
4 42
5 140
6 480
7 1710
8 6227
9 23087
10 87495
11 335253
12 1304117
13 5120189
14 20286069
15 81087950
16 326175588
17 1321918434
18 5385669252
19 22062590893
20 90821095614
21 375419697147
22 1558667802107
23 6493810637583
24 27152832780694
25 113894033778109
26 479137002109941
27 2021504946377131
28 8550206541089202