# A277395 (b-file synthesized from sequence entry)
0 1
1 3
2 9
3 33
4 145
5 713
6 3745
7 20513
8 115713
9 667329
10 3916033
11 23305857
12 140327681
13 853262465
14 5231925761
15 32313686529
16 200843829249
17 1255308123137
18 7884792852481
19 49745076576257
20 315091155558401
21 2003009460686849
22 12774610185633793