# A003289 (b-file synthesized from sequence entry)
1 1
2 2
3 4
4 10
5 30
6 98
7 328
8 1140
9 4040
10 14542
11 53060
12 195624
13 727790
14 2728450
15 10296720
16 39084190
17 149115456
18 571504686
19 2199310460
20 8494701152
21 32919635606
22 127961125094
23 498775164568
24 1949112527750
25 7634623480172