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A014388
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a(2n-1) = n+2, a(2n) = smallest number requiring n+2 letters in English.
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6
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3, 1, 4, 4, 5, 3, 6, 11, 7, 15, 8, 13, 9, 17, 10, 24, 11, 23, 12, 73, 13, 3000, 14, 11000, 15, 15000, 16, 101, 17, 104, 18, 103, 19, 111, 20, 115
(list; graph; refs; listen; history; internal format)
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