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A115931
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Numbers k such that k and 7*k, taken together, are zeroless pandigital.
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4
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..7.
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EXAMPLE
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2394 and 2394*7=16758 use once all the digits from 1 to 9.
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MATHEMATICA
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Select[Range[8000], Sort[Join[IntegerDigits[#], IntegerDigits[#*7]]] == Range[ 9]&] (* Harvey P. Dale, Aug 31 2017 *)
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CROSSREFS
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Cf. A054383, A064160, A115927, A115929, A115930, A115932.
Sequence in context: A279538 A098680 A226149 * A323344 A323341 A108055
Adjacent sequences: A115928 A115929 A115930 * A115932 A115933 A115934
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KEYWORD
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nonn,base,fini,full,changed
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AUTHOR
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Giovanni Resta, Feb 06 2006
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STATUS
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approved
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