# A005610 (b-file synthesized from sequence entry)
1 2
2 14
3 86
4 518
5 3110
6 18662
7 111974
8 671846
9 4031078
10 24186470
11 145118822
12 870712934
13 5224277606
14 31345665638
15 188073993830
16 1128443962982
17 6770663777894
18 40623982667366
19 243743896004198
20 1462463376025190