# A155597 (b-file synthesized from sequence entry)
0 1
1 5
2 33
3 209
4 1281
5 7745
6 46593
7 279809
8 1679361
9 10077185
10 60465153
11 362795009
12 2176778241
13 13060685825
14 78364147713
15 470184951809
16 2821109841921
17 16926659313665
18 101559956406273
19 609359739486209
20 3656158439014401
21 21936950638280705
22 131621703838072833