# A198628 (b-file synthesized from sequence entry)
0 1
1 3
2 15
3 81
4 435
5 2313
6 12195
7 63801
8 331395
9 1710153
10 8775075
11 44808921
12 227890755
13 1155180393
14 5839846755
15 29458152441
16 148335904515
17 745888593033
18 3746364947235
19 18799770158361
20 94271405748675
21 472449569948073
22 2366624981836515
23 11850654345690681
24 59323452211439235