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A219112
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Numbers that eventually reach 1 under "x -> sum of 5th power of digits of x".
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0
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1, 10, 100, 1000, 10000, 100000, 1000000, 1111222, 1112122, 1112212, 1112221, 1121122, 1121212, 1121221, 1122112, 1122121, 1122211, 1211122, 1211212, 1211221, 1212112, 1212121, 1212211, 1221112, 1221121, 1221211, 1222111, 2111122, 2111212, 2111221, 2112112
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OFFSET
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1,2
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LINKS
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EXAMPLE
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1112122 is in the sequence because 1^5 +1^5+1^5+2^5+1^5 +2^5+2^5 = 100 and 1^5 + 0^5 + 0^5 = 1.
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MATHEMATICA
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Select[Range[50000], FixedPoint[Total[IntegerDigits[#]^5]&, #, 10]==1&]
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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