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A190640
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Numbers whose base-3 expansion ends in 2 and does not contain any 1's.
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2
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2, 8, 20, 26, 56, 62, 74, 80, 164, 170, 182, 188, 218, 224, 236, 242, 488, 494, 506, 512, 542, 548, 560, 566, 650, 656, 668, 674, 704, 710, 722, 728, 1460, 1466, 1478, 1484, 1514, 1520, 1532, 1538, 1622, 1628, 1640, 1646, 1676, 1682, 1694, 1700, 1946, 1952, 1964, 1970, 2000, 2006, 2018, 2024, 2108, 2114, 2126
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refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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FORMULA
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MATHEMATICA
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Select[Range[2200], Last[IntegerDigits[#, 3]]==2&&DigitCount[#, 3, 1]==0&] (* Harvey P. Dale, Sep 09 2012 *)
FromDigits[#, 3]&/@(Join[#, {2}]&/@Tuples[{0, 2}, 7]) (* Harvey P. Dale, Jul 25 2020 *)
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PROG
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CROSSREFS
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KEYWORD
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nonn,base,easy
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AUTHOR
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STATUS
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approved
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