# A125654 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 4
4 9
5 24
6 75
7 269
8 1091
9 4940
10 24699
11 135141
12 803122
13 5150259
14 35436569
15 260300079
16 2032260757
17 16798435176
18 146498077799
19 1343752561687
20 12927673809234
21 130120187348654
22 1367117984143960
23 14962669807495136