# A007027 (b-file synthesized from sequence entry)
4 1
5 0
6 1
7 1
8 4
9 10
10 53
11 292
12 2224
13 18493
14 167504
15 1571020
16 15151289
17 148864939
18 1485904672
19 15028654628
20 153781899708
21 1589921572902
22 16591187039082