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A124870 as a simple table

na(n)
01
110
225
3500
42500
525000
631250
71250000
86250000
962500000
1078125000
113125000000
1215625000000
13156250000000
14195312500000
157812500000000
1639062500000000
17390625000000000
18488281250000000
1919531250000000000

[1,10,25,500,2500,25000,31250,1250000,6250000,
 62500000,78125000,3125000000,15625000000,
 156250000000,195312500000,7812500000000,
 39062500000000,390625000000000,488281250000000,
 19531250000000000]