# A003227 (b-file synthesized from sequence entry)
1 1
2 1
3 3
4 8
5 22
6 58
7 160
8 434
9 1204
10 3341
11 9363
12 26308
13 74376
14 210823
15 599832
16 1710803
17 4891876
18 14015505
19 40231632
20 115669419
21 333052242
22 960219982
23 2771707332
24 8009222307
25 23166563032
26 67069289457
27 194332834601