# A149521 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 11
4 51
5 147
6 691
7 2229
8 10569
9 36587
10 174151
11 631267
12 3015819
13 11297343
14 54109527
15 207809319
16 997352927
17 3905712813
18 18775928973
19 74694466147
20 359566404155
21 1449137185583
22 6983876576051
23 28456062978505
24 137272752795641
25 564570822135359
26 2725789916924483
27 11301486545827607