# A006743 (b-file synthesized from sequence entry)
3 1
4 0
5 3
6 2
7 10
8 14
9 40
10 74
11 176
12 358
13 798
14 1670
15 3626
16 7638
17 16366
18 34462
19 73230
20 153830
21 324896
22 680514
23 1430336
24 2987310
25 6253712
26 13025954
27 27176052
28 56465878
29 117458820
30 243507250
31 505239264
32 1045301486