# A022873 (b-file synthesized from sequence entry)
1 2
2 1
3 1
4 2
5 6
6 19
7 61
8 197
9 638
10 2068
11 6706
12 21747
13 70525
14 228714
15 741726
16 2405442
17 7800930
18 25298683
19 82044498
20 266073128
21 862884304
22 2798363473
23 9075188983
24 29431149984
25 95446231592
26 309535411633
27 1003833985448