# A149907 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 15
4 45
5 143
6 483
7 1644
8 5848
9 21178
10 77716
11 290588
12 1097869
13 4182986
14 16151078
15 62672479
16 245500460
17 967557537
18 3835676351
19 15285272154
20 61245921696
21 246253276079
22 995260779078
23 4034182783045
24 16419400425310
25 67016453054374
26 274452294823460
27 1126645933307878
28 4639258411263086