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A102717
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"Lightest" sequence built with one "1", two "2", three "3", ..., nine "9" (and no "0"). The weight of such a sequence is the total sum of its integers [the sequence is finite, by definition and a(n+1) must be > a(n)].
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0
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5, 6, 7, 8, 9, 19, 28, 29, 37, 38, 39, 46, 47, 48, 49, 56, 57, 58, 59, 67, 68, 69, 78, 79, 89
(list; graph; refs; listen; history; internal format)
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