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A028693 as a simple table

na(n)
11
223
313225
4182809175
560651514035625
6482945140644890444375
792292253139031982469134515625
8423295781586452233477722435457009484375
946594416147080909523690749946376478698532878515625

[1,23,13225,182809175,60651514035625,
 482945140644890444375,
 92292253139031982469134515625,
 423295781586452233477722435457009484375,
 46594416147080909523690749946376478698532878515625\
 ]