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A212284
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First a(n) > 1 whose sum of digits is the same in base 10 as in base n.
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1
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20, 21, 12, 40, 50, 21, 70, 153, 10, 190, 108, 40, 126, 135, 50, 153, 162, 20, 180, 190, 70, 207, 216, 80, 234, 243, 30, 261, 270, 190, 290, 594, 102, 315, 324, 40, 342, 351, 120, 370, 380, 130, 792, 405, 50, 423, 432, 150, 450, 460, 160, 480, 490, 60, 504
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OFFSET
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2,1
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COMMENTS
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There might exist an n for which there is no solution, in which case a(n) would be set to 0 by convention; however, no such case was found so far. Problem: does it exist?
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LINKS
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EXAMPLE
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a(12)=108 because 108 is the first number > 1 such that when written in base 10 and in base 12 (i.e., 90), the sum of the expansion digits is the same, namely 9.
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CROSSREFS
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KEYWORD
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nonn,easy,base
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AUTHOR
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STATUS
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approved
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