# A099133 (b-file synthesized from sequence entry)
0 0
1 1
2 4
3 32
4 192
5 1280
6 8192
7 53248
8 344064
9 2228224
10 14417920
11 93323264
12 603979776
13 3909091328
14 25300041728
15 163745628160
16 1059783180288
17 6859062771712
18 44392781971456
19 287316132233216
20 1859549040476160
21 12035254277636096
22 77893801758162944