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A168364 as a simple table

na(n)
00
11
280
31215
48704
540625
6143856
7420175
81064960
92421009
105050000
119824111
1218040320
1331559905
1452975664
1585809375
16134742016
17205879265
18307054800
19448173919
20641600000
21902586321
221249755760
231705630895
242297217024

[0,1,80,1215,8704,40625,143856,420175,1064960,
 2421009,5050000,9824111,18040320,31559905,
 52975664,85809375,134742016,205879265,307054800,
 448173919,641600000,902586321,1249755760,
 1705630895,2297217024]