A136897 Numbers k such that k and k^2 use only the digits 0, 2, 4 and 5.

0, 2, 5, 20, 45, 50, 200, 205, 450, 500, 502, 505, 2000, 2005, 2050, 2245, 4500, 5000, 5002, 5005, 5020, 5045, 5050, 20000, 20005, 20050, 20500, 20505, 22450, 45000, 45005, 50000, 50002, 50005, 50020, 50045, 50050, 50200, 50205, 50450, 50500, 50502, 200000, 200005, 200050, 200500, 200505, 205000, 205050, 224500, 450000, 450005, 450045, 450050

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..1179

J. Wellons, Tables of Shared Digits [archived]

Example

505524500450^2 = 255555020555222050202500.

Mathematica

Module[{c={0, 2, 4, 5}}, Select[FromDigits/@Tuples[c, 6], SubsetQ[c, IntegerDigits[ #^2]]&]] (* Harvey P. Dale, Jul 30 2015 *)

Crossrefs

Sequence in context: A136899 A136882 A136901 * A098510 A168541 A124264

Adjacent sequences: A136894 A136895 A136896 * A136898 A136899 A136900

Keyword

base,nonn

Author

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

Status

approved