**Numbers n such that Q(n) + Q(n^2) + Q(n^3) is a perfect square where Q(n) is the sum of the digits of n.**

*9, 18, 45, 90, 171, 180, 207, 279, 297, 396, 414, 450, 459, 486, 567, 576, 693, 702*

*1 seqfan posts*

Index of A-numbers in seqfan: by ascending order by month by frequency by keyword

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