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A056916 as a simple table

na(n)
11
22
39
432
5625
6648
7117649
8131072
94782969
1012500000
1125937424601
12214990848
1323298085122481
141771684761728
1514416259765625
16562949953421312
1748661191875666868481
1811712917736940032
19104127350297911241532841
205120000000000000000
217788651757984142343081

[1,2,9,32,625,648,117649,131072,4782969,12500000,
 25937424601,214990848,23298085122481,
 1771684761728,14416259765625,562949953421312,
 48661191875666868481,11712917736940032,
 104127350297911241532841,5120000000000000000,
 7788651757984142343081]