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A067500
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Powers of 3 with digit sum also a power of 3.
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13
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1, 3, 9, 27, 81, 243, 19683, 59049, 177147, 1594323, 43046721, 129140163, 10460353203, 7625597484987, 617673396283947, 50031545098999707, 150094635296999121, 4052555153018976267
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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COMMENTS
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LINKS
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MATHEMATICA
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With[{l3s=3^Range[0, 200]}, Select[l3s, MemberQ[l3s, Total[IntegerDigits[ #]]]&]] (* Harvey P. Dale, May 20 2011 *)
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CROSSREFS
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KEYWORD
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base,easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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