# A151476 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 13
4 52
5 221
6 969
7 4476
8 21050
9 101708
10 499482
11 2491362
12 12586523
13 64275443
14 331393163
15 1722648256
16 9020489609
17 47541144560
18 252014613424
19 1342905834870
20 7189725796882
21 38658137171795
22 208674158480442
23 1130457902895656
24 6144313389541112
25 33497736351060064
26 183139829758877682