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A158608 as a simple table

na(n)
01
14
220
384
4404
51748
68212
736180
8167572
9746452
103427604
1115370836
1270212500
13316145876
141439545876
156497879892
1629530613908
17133496692180
18605986514708
192741933589588
2012437717824916
2156308655258324
22255312140456980

[1,4,20,84,404,1748,8212,36180,167572,746452,
 3427604,15370836,70212500,316145876,1439545876,
 6497879892,29530613908,133496692180,605986514708,
 2741933589588,12437717824916,56308655258324,
 255312140456980]