# A199875 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 12
4 51
5 233
6 1126
7 5639
8 29001
9 152364
10 814268
11 4412733
12 24193883
13 133964582
14 748084930
15 4208233719
16 23825366565
17 135657095301
18 776310257573
19 4462597387720
20 25757503356976
21 149216036734018
22 867316809868018
23 5056666312351966
24 29564095191382323