# A007221 (b-file synthesized from sequence entry)
8 6
9 216
10 3706
11 44060
12 417486
13 3386912
14 24554562
15 163587572
16 1020918342
17 6050527496
18 34395992698
19 188971062108
20 1009130882494
21 5261414979024