# A005305 (b-file synthesized from sequence entry)
2 2
3 4
4 8
5 16
6 30
7 56
8 100
9 172
10 290
11 480
12 780
13 1248
14 1970
15 3068
16 4724
17 7200
18 10862
19 16240
20 24080