# A006603 (b-file synthesized from sequence entry)
0 1
1 2
2 7
3 26
4 107
5 468
6 2141
7 10124
8 49101
9 242934
10 1221427
11 6222838
12 32056215
13 166690696
14 873798681
15 4612654808
16 24499322137
17 130830894666
18 702037771647
19 3783431872018
20 20469182526595
21 111133368084892
22 605312629105205
23 3306633429423460
24 18111655081108453