# A149929 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 15
4 48
5 168
6 608
7 2268
8 8662
9 33778
10 134184
11 539871
12 2197090
13 9030000
14 37459341
15 156606474
16 659061461
17 2790192515
18 11877890745
19 50819264437
20 218390536236
21 942266919891
22 4080623902277
23 17732994440363
24 77305062398569
25 337974770301276
26 1481583893527512
27 6511260259152370