# A228343 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 15
4 50
5 175
6 625
7 2251
8 8142
9 29544
10 107538
11 392726
12 1439204
13 5292833
14 19533241
15 72333107
16 268728214
17 1001448308
18 3742866166
19 14026901282
20 52701685564
21 198481560878
22 749170991770
23 2833635556670
24 10738689128460
25 40770816357920
26 155056284790340
27 590644481896972