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A028353 as a simple table

na(n)
01
15
289
33429
4230481
523941125
63555578025
7715154761125
8187188449198625
961836509511685125
1025163273966324405625
1112368068140988819153125
127224011282550809645600625

[1,5,89,3429,230481,23941125,3555578025,
 715154761125,187188449198625,61836509511685125,
 25163273966324405625,12368068140988819153125,
 7224011282550809645600625]