# A148209 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 4
4 12
5 36
6 121
7 418
8 1517
9 5671
10 21784
11 85414
12 341147
13 1383072
14 5681804
15 23605521
16 99049677
17 419246520
18 1788325790
19 7680990743
20 33195379744
21 144265731947
22 630155621447
23 2765248595670
24 12185699434223
25 53907043689333
26 239323911841937
27 1065992073492313
28 4762597890754407