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A115924
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Numbers k such that k and 4*k, taken together, are pandigital.
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5
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OFFSET
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1,1
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LINKS
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EXAMPLE
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15237 and 60948=15237*4 together contain all the 10 digits once.
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MATHEMATICA
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Select[Range[10234, 24987], Sort[Join[IntegerDigits[4 #], IntegerDigits[ #]]] == Range[0, 9]&] (* Harvey P. Dale, Jun 01 2017 *)
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PROG
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(PARI) {for(n=10234, 24987, #Set(digits(n))==5||next; #Set(digits(n*4))==5 && #Set(concat(digits(n), digits(n*4)))==10 && print1(n", "))} \\ M. F. Hasler, Feb 08 2014
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CROSSREFS
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KEYWORD
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nonn,base,fini,full
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AUTHOR
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STATUS
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approved
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