# A045900 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 8
4 25
5 85
6 318
7 1234
8 4884
9 19458
10 77727
11 310761
12 1242853
13 4971151
14 19884270
15 79536639
16 318145993
17 1272583241
18 5090332042
19 20361326983
20 81445306447
21 325781223902
22 1303124893253
23 5212499570050
24 20849998276525
25 83399993101506
26 333599972400353