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

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

Offset

1,1

Links

Table of n, a(n) for n=1..7.

Example

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

Mathematica

Select[Range[8000], Sort[Join[IntegerDigits[#], IntegerDigits[#*7]]] == Range[ 9]&] (* Harvey P. Dale, Aug 31 2017 *)

Crossrefs

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

Sequence in context: A279538 A098680 A226149 * A323344 A323341 A108055

Adjacent sequences: A115928 A115929 A115930 * A115932 A115933 A115934

Keyword

nonn,base,fini,full

Author

Giovanni Resta, Feb 06 2006

Status

approved