# A005630 (b-file synthesized from sequence entry)
1 0
2 0
3 0
4 0
5 0
6 0
7 4
8 10
9 34
10 96
11 284
12 782
13 2226
14 6208
15 17560
16 49618
17 141500
18 405104
19 1168316
20 3386538
21 9875232
22 28939944
23 85235762
24 252159572
25 749160544
26 2234378156
27 6688358338
28 20088296030
29 60524845158
30 182893018756