# A211281 (b-file synthesized from sequence entry)
0 1
1 3
2 7
3 17
4 45
5 123
6 337
7 927
8 2575
9 7225
10 20427
11 58085
12 165967
13 476241
14 1371615
15 3962817
16 11480157
17 33335691
18 96998137
19 282751095
20 825549445
21 2413818011
22 7066833237
23 20713316043
24 60775993945
25 178497281223
26 524702227369
27 1543636437591
28 4544652411561
29 13389233104135
30 39471952247297