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A112131
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Concatenate the consecutive increasing numbers starting with Harshad(n) and ending with Harshad(n+1).
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3
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12, 23, 34, 45, 56, 67, 78, 89, 910, 101112, 12131415161718, 181920, 2021, 21222324, 24252627, 27282930, 30313233343536, 3637383940, 404142, 42434445, 45464748, 484950, 5051525354, 54555657585960, 60616263, 6364656667686970, 707172
(list; graph; refs; listen; history; internal format)
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