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A025628
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Numbers of form 6^i*9^j, with i, j >= 0.
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6
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1, 6, 9, 36, 54, 81, 216, 324, 486, 729, 1296, 1944, 2916, 4374, 6561, 7776, 11664, 17496, 26244, 39366, 46656, 59049, 69984, 104976, 157464, 236196, 279936, 354294, 419904, 531441, 629856, 944784, 1417176, 1679616, 2125764, 2519424, 3188646
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OFFSET
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1,2
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LINKS
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FORMULA
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Sum_{n>=1} 1/a(n) = (6*9)/((6-1)*(9-1)) = 27/20. - Amiram Eldar, Sep 26 2020
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MATHEMATICA
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n = 10^6; Flatten[Table[6^i*9^j, {i, 0, Log[6, n]}, {j, 0, Log[9, n/6^i]}]] // Sort (* Amiram Eldar, Sep 26 2020 *)
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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