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A039381
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Numbers whose base-9 representation has the same nonzero number of 3's and 7's.
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0
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34, 66, 115, 147, 196, 228, 250, 259, 268, 286, 295, 304, 306, 307, 308, 310, 311, 312, 314, 322, 358, 390, 439, 471, 520, 552, 570, 579, 588, 594, 595, 596, 598, 599, 600, 602, 606, 615, 624, 642, 682, 714, 763, 795, 844, 876, 925, 957, 979, 988, 997, 1015, 1024, 1033, 1035, 1036, 1037, 1039, 1040, 1041, 1043, 1051
(list;
graph;
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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MATHEMATICA
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okQ[n_]:=Module[{dc3=DigitCount[n, 9, 3]}, dc3>0&&dc3==DigitCount[n, 9, 7]]
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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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EXTENSIONS
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STATUS
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approved
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