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A220256 as a simple table

na(n)
14
235
3243
41875
515150
6115776
7903439
87005461
954249716
10420545092
113257486504
1225234938173
13195482980668
141514241800363
1511729682534441
1690860069201775
17703816232110196
185451868968128240
1942230976869002531
20327127333101076004

[4,35,243,1875,15150,115776,903439,7005461,
 54249716,420545092,3257486504,25234938173,
 195482980668,1514241800363,11729682534441,
 90860069201775,703816232110196,5451868968128240,
 42230976869002531,327127333101076004]