# A192624 (b-file synthesized from sequence entry)
0 1
1 4
2 20
3 112
4 676
5 4328
6 28912
7 199392
8 1409364
9 10157828
10 74375640
11 551715264
12 4137527408
13 31318286632
14 238958947328
15 1835960454272
16 14192132860868
17 110298595778872
18 861338925309604
19 6755283201399776
20 53185599585579640