**Start with a(1) = 1 then a(n) = smallest number > a(n-1) such that a(n) divides concat(a(1), a(2), ..., a(n)).**

*1, 2, 3, 5, 10, 12, 15, 20, 25, 30, 39, 44, 50, 100, 101, 125, 150, 188, 200, 220, 230*

*2 seqfan posts*

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

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