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1, 1, 3, 1, 7, 5, 3, 2, 7, 7, 6, 5, 7, 13, 7, 4, 5, 7, 9, 7, 3, 6, 10, 22, 11, 7, 19, 13, 15, 7, 6, 4, 31, 5, 13, 7, 19, 20, 7, 22, 11, 13, 15, 31, 7, 24, 10, 69, 43, 11, 5, 7, 44, 19, 31, 26, 9, 15, 42, 7, 31, 6, 13, 4, 7, 31, 69, 5, 67, 13, 124, 26, 9, 19, 11, 20, 31, 7, 18, 69, 28, 11, 126
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refs;
listen;
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internal format)
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OFFSET
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1,3
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COMMENTS
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This sequence is well-defined.
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LINKS
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Romanian Master in Mathematics Contest, Problem 3, Bucharest, 2007.
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MATHEMATICA
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spi[n_]:=Module[{m=1}, While[!Divisible[Floor[4^m/m], n], m++]; m]; Array[ spi, 90] (* Harvey P. Dale, Sep 13 2020 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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