A136956 Numbers k such that k and k^2 use only the digits 0, 4, 6, 8 and 9.

0, 8, 64, 80, 98, 640, 664, 800, 898, 980, 998, 6400, 6640, 6664, 8000, 8980, 8998, 9800, 9980, 9998, 64000, 66400, 66640, 66664, 80000, 89800, 89980, 89998, 98000, 98998, 99800, 99980, 99998, 640000, 664000, 664064, 666400, 666640, 666664, 684908, 800000, 806008, 896886, 898000, 899800, 899980, 899998, 980000, 989980, 989998, 990408, 998000

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..1208

J. Wellons, Tables of Shared Digits [archived]

Example

984686089068008^2 = 969606694004048984086049088064.

Mathematica

With[{c={0, 4, 6, 8, 9}}, Select[FromDigits/@Tuples[c, 6], SubsetQ[ c, IntegerDigits[ #^2]]&]] (* Harvey P. Dale, Feb 04 2015 *)

Crossrefs

Essentially the same as A107626. - R. J. Mathar, Feb 28 2009

Sequence in context: A043078 A037413 A107626 * A345946 A161146 A208380

Adjacent sequences: A136953 A136954 A136955 * A136957 A136958 A136959

Keyword

base,nonn

Author

Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008

Status

approved