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A164768
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First differences of A003592.
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1
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1, 2, 1, 3, 2, 6, 4, 5, 7, 8, 10, 14, 16, 20, 25, 3, 32, 40, 50, 6, 64, 80, 100, 12, 113, 15, 160, 200, 24, 226, 30, 320, 400, 48, 452, 60, 565, 75, 800, 96, 904, 120, 1130, 150, 1600, 192, 1808, 240, 2260, 300, 2825, 375, 384, 3616, 480, 4520, 600, 5650
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OFFSET
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1,2
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COMMENTS
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The gaps between the natural numbers whose reciprocals are terminating decimals.
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LINKS
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FORMULA
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EXAMPLE
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The first few terms of A003592 are 1, 2, 4, 5, 8, 10, 16 because 1/1, 1/2, 1,4, 1/5, 1/8 etc. terminate and 1/3, 1/6, 1/7, 1/9 etc. repeat. Hence the denominators of the first few terminating decimals are 1, 2, 4, 5, 8, 10, 16 and the first differences between these gives the sequence 1,2,1,3,2,4
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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Barry Wells (wells.barry(AT)gmail.com), Aug 26 2009, Sep 24 2009
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STATUS
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approved
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