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A084875 as a simple table

na(n)
00
10
21
3350
424025
51061570
638306701
71238697950
837547263825
91093418309690
1031035659056501
11866306577308150
1223915774118612025
13655397866616830610
1417872808187862527901
15485794481046271815950
1613175146525408965630625

[0,0,1,350,24025,1061570,38306701,1238697950,
 37547263825,1093418309690,31035659056501,
 866306577308150,23915774118612025,
 655397866616830610,17872808187862527901,
 485794481046271815950,13175146525408965630625]