# A030875 (b-file synthesized from sequence entry)
1 1
2 2
3 7
4 28
5 140
6 843
7 5902
8 47216
9 424948
10 4249480
11 46744286
12 560931432
13 7292108623
14 102089520734
15 1531342811023
16 24501484976368
17 416525244598260
18 7497454402768693
19 142451633652605184
20 2849032673052103686