# A132053 (b-file synthesized from sequence entry)
8 1
9 108
10 7470
11 429660
12 22629915
13 1143782640
14 56936699820
15 2835191759400
16 142610008065525
17 7291723635296100
18 380553986882119050
19 20327650785482940900
20 1113292728197378103375
21 62584367768103890709000