# A268213 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 16
4 51
5 180
6 622
7 2288
8 8227
9 30940
10 113882
11 434112
12 1622414
13 6240360
14 23572668
15 91245600
16 347398435
17 1351035180
18 5174839714
19 20197293600
20 77729205658
21 304232711640
22 1175332659332
23 4610721207456
24 17868732968846
25 70228114687640
26 272886854006852