# A003427 (b-file synthesized from sequence entry)
1 0
2 0
3 0
4 0
5 1
6 1
7 1
8 2
9 4
10 8
11 16
12 34
13 72
14 158
15 348
16 784
17 1777
18 4080
19 9425
20 21965
21 51456
22 121300
23 287215
24 683268
25 1631532
26 3910235
27 9401000
28 22670058
29 54813780
30 132867903