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Search: id:A055812
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| A055812 |
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a(n) and floor[a(n)/5] are both squares; i.e. squares which remain squares when written in base 5 and last digit is removed. |
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2
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| 0, 1, 4, 9, 49, 81, 324, 2209, 15129, 25921, 103684, 710649, 4870849, 8346321, 33385284, 228826129, 1568397609
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