# A148473 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 20
5 65
6 226
7 838
8 3201
9 12386
10 48948
11 197608
12 809096
13 3345155
14 13980334
15 59041103
16 251334992
17 1076995274
18 4645807488
19 20164588874
20 87973297367
21 385580488738
22 1697545399851
23 7504250584691
24 33293669209338
25 148208341418642
26 661867001127396
27 2964446051683526
28 13313133410772356