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A115931 Numbers k such that k and 7*k, taken together, are zeroless pandigital. 4

%I

%S 2394,2637,4527,5274,5418,5976,7614

%N Numbers k such that k and 7*k, taken together, are zeroless pandigital.

%e 2394 and 2394*7=16758 use once all the digits from 1 to 9.

%t Select[Range[8000],Sort[Join[IntegerDigits[#],IntegerDigits[#*7]]] == Range[ 9]&] (* _Harvey P. Dale_, Aug 31 2017 *)

%Y Cf. A054383, A064160, A115927, A115929, A115930, A115932.

%K nonn,base,fini,full

%O 1,1

%A _Giovanni Resta_, Feb 06 2006

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Last modified September 23 02:41 EDT 2021. Contains 347609 sequences. (Running on oeis4.)