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A070021
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1/n has period 1 in base 10 (but not terminating).
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4
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3, 6, 9, 12, 15, 18, 24, 30, 36, 45, 48, 60, 72, 75, 90, 96, 120, 144, 150, 180, 192, 225, 240, 288, 300, 360, 375, 384, 450, 480, 576, 600, 720, 750, 768, 900, 960, 1125, 1152, 1200, 1440, 1500, 1536, 1800, 1875, 1920, 2250, 2304, 2400, 2880, 3000, 3072, 3600
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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FORMULA
| Numbers of the form a*b*c where a is in {3, 9}, b is a power of 2 and c is a power of 5.
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EXAMPLE
| 12 is in the sequence since 1/12=0.08333333333...; 11 is not since 1/11=0.0909090909...; 10 is not, since despite 1/10=0.099999999..., it is also true that 1/10=0.1 exactly.
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CROSSREFS
| Cf. A003592, A069105, A070022, A070023.
Sequence in context: A194226 A193803 A039004 * A083354 A156242 A060293
Adjacent sequences: A070018 A070019 A070020 * A070022 A070023 A070024
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KEYWORD
| base,nonn
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AUTHOR
| Henry Bottomley (se16(AT)btinternet.com), Apr 12 2002
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