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 A039667 Numbers k that together with their double and triple contain every digit from 1-9 exactly once. 0
 192, 219, 273, 327 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 REFERENCES D. Wells, Curious and interesting numbers, Penguin Books, p. 128. LINKS Table of n, a(n) for n=0..3. P. De Geest, Nine digits digressions EXAMPLE k=327 -> 2k=654 -> 3k=981 and 327654981 is a 'nine-digit' number. MATHEMATICA pdnQ[n_]:=Sort[Flatten[IntegerDigits[{n, 2n, 3n}]]]==Range[9]; Select[Range[987], pdnQ] (* Harvey P. Dale, Jul 07 2012 *) CROSSREFS Cf. A050289. Sequence in context: A206335 A289219 A190892 * A273890 A344860 A045077 Adjacent sequences: A039664 A039665 A039666 * A039668 A039669 A039670 KEYWORD nonn,base,fini,full AUTHOR Felice Russo EXTENSIONS Corrected by Patrick De Geest, Mar 15 2000 Better definition from Tanya Khovanova, Mar 08 2021 STATUS approved

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Last modified May 18 08:45 EDT 2024. Contains 372618 sequences. (Running on oeis4.)