# A007851 (b-file synthesized from sequence entry)
1 1
2 4
3 14
4 48
5 167
6 593
7 2144
8 7864
9 29171
10 109173
11 411501
12 1560089
13 5943199
14 22732739
15 87253604
16 335897864
17 1296447899
18 5015206349
19 19439895089
20 75487384829
21 293595204239
22 1143532045499
23 4459774977449
24 17413705988873