# A037739 (b-file synthesized from sequence entry)
1 2
2 13
3 81
4 486
5 2918
6 17509
7 105057
8 630342
9 3782054
10 22692325
11 136153953
12 816923718
13 4901542310
14 29409253861
15 176455523169
16 1058733139014
17 6352398834086
18 38114393004517
19 228686358027105
20 1372118148162630