# A307900 (b-file synthesized from sequence entry)
1 1
2 2
3 4
4 10
5 24
6 61
7 150
8 382
9 964
10 2452
11 6307
12 16379
13 42989
14 113965
15 305035
16 823632
17 2241814
18 6145670
19 16956972
20 47059076
21 131279567