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A133486
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a(n) = Sum_{ k = 0 to n-1} ( subtract k modulo 9 from 9, multiply this by k-th power of 10 ).
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0
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9, 89, 789, 6789, 56789, 456789, 3456789, 23456789, 123456789, 9123456789, 89123456789, 789123456789
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