**Skinny numbers: numbers n with property that there are no carries when n is squared by "long multiplication".**

*0, 1, 2, 3, 10, 11, 12, 13, 20, 21, 22, 30, 31, 100, 101, 102, 103, 110, 111, 112, 113*

*2 seqfan posts*

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

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