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A305877
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Numbers in base 3 reversed.
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2
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0, 1, 2, 1, 11, 21, 2, 12, 22, 1, 101, 201, 11, 111, 211, 21, 121, 221, 2, 102, 202, 12, 112, 212, 22, 122, 222, 1, 1001, 2001, 101, 1101, 2101, 201, 1201, 2201, 11, 1011, 2011, 111, 1111, 2111, 211, 1211, 2211, 21, 1021, 2021, 121, 1121, 2121, 221, 1221, 2221, 2
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OFFSET
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0,3
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LINKS
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FORMULA
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EXAMPLE
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11 is 102 in base 3, and reversing it gives 201 = a(11).
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MAPLE
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a:= n-> parse(cat(convert(n, base, 3)[])):
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MATHEMATICA
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Table[FromDigits@ Reverse@ IntegerDigits[n, 3], {n, 0, 54}] (* Giovanni Resta, Jun 13 2018 *)
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PROG
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(PARI) a(n) = fromdigits(Vecrev(digits(n, 3)), 10); \\ Michel Marcus, Jun 13 2018
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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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