A136932 Numbers k such that k and k^2 use only the digits 0, 3, 4, 6 and 9.

0, 3, 6, 30, 60, 63, 64, 300, 306, 600, 603, 630, 636, 640, 3000, 3006, 3060, 6000, 6003, 6030, 6300, 6360, 6400, 6636, 30000, 30006, 30060, 30600, 60000, 60003, 60030, 60300, 63000, 63600, 64000, 66360, 300000, 300006, 300060, 300600, 306000, 600000, 600003, 600030, 600300, 603000, 630000, 636000, 640000, 663600, 949003, 3000000, 3000006

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..888

J. Wellons, Tables of Shared Digits [archived]

Example

969360639630393^2 = 939660049664644643999649334449.

Mathematica

Module[{nn=7, c={0, 3, 4, 6, 9}}, Select[FromDigits/@Tuples[c, nn], SubsetQ[c, IntegerDigits[#^2]]&]] (* Harvey P. Dale, Dec 28 2024 *)

Crossrefs

Sequence in context: A200925 A140814 A343433 * A136945 A260906 A136894

Adjacent sequences: A136929 A136930 A136931 * A136933 A136934 A136935

Keyword

base,nonn,changed

Author

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

Status

approved