# A006868 (b-file synthesized from sequence entry)
6 1
7 0
8 1
9 1
10 1
11 2
12 3
13 6
14 9
15 15
16 45
17 59
18 188
19 399
20 827
21 2472
22 5073
23 14153
24 35489
25 85726