# A127539 (b-file synthesized from sequence entry)
0 1
1 0
2 1
3 0
4 3
5 3
6 16
7 37
8 134
9 411
10 1411
11 4747
12 16500
13 57671
14 204380
15 730032
16 2629637
17 9535268
18 34787215
19 127585608
20 470162614
21 1739952061
22 6463845941
23 24096378885
24 90112499714
25 337965831635
26 1270901550454
27 4790836498608
28 18100497143361