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Search: id:A115527
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| A115527 |
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Numbers n such that the concatenation of n with 2*n gives a square. |
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30
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| 3, 8163265306122448979592, 18367346938775510204082, 32653061224489795918368, 504986744097967428355005681100871102133568993813912384800
(list; graph; listen)
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