# A055147 (b-file synthesized from sequence entry)
1 1
2 8
3 51
4 310
5 1865
6 11191
7 67146
8 402877
9 2417263
10 14503579
11 87021476
12 522128857
13 3132773145
14 18796638871
15 112779833230
16 676678999381
17 4060073996291
18 24360443977748
19 146162663866488
20 876975983198930