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A290505 as a simple table

na(n)
1203125
2265625
3406250
4453125
5531250
6578125
7609375
8640625
9796875
10812500
11828125
12906250
13953125
141062500
151140625
161156250
171218750
181281250
191359375
201390625
211421875
221515625
231578125
241593750
251625000
261656250
271703125
281734375
291765625
301812500

[203125,265625,406250,453125,531250,578125,609375,
 640625,796875,812500,828125,906250,953125,1062500,
 1140625,1156250,1218750,1281250,1359375,1390625,
 1421875,1515625,1578125,1593750,1625000,1656250,
 1703125,1734375,1765625,1812500]