A115929 Numbers k such that k and 4*k, taken together, are zeroless pandigital, that is, use all the digits 1-9 exactly once.

3942, 4392, 5796, 7956

Offset

1,1

Links

Table of n, a(n) for n=1..4.

Example

3942 and 3942*4=15768 use once all the digits from 1 to 9.

Mathematica

Select[Range[1000, 9999], Union[IntegerDigits[#], IntegerDigits[4 #]] == {1, 2, 3, 4, 5, 6, 7, 8, 9} &] (* Tanya Khovanova, Jul 05 2021 *)

Crossrefs

Cf. A054383, A064160, A115927, A115930, A115931, A115932.

Sequence in context: A252455 A233688 A162859 * A346135 A070185 A059354

Adjacent sequences: A115926 A115927 A115928 * A115930 A115931 A115932

Keyword

nonn,base,fini,full

Author

Giovanni Resta, Feb 06 2006

Status

approved