**a(n) = (sum of digits of n) + (product of digits of n).**

*0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 2, 5, 8, 11, 14, 17, 20*

*1 seqfan posts*

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

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