A136898 Numbers k such that k and k^2 use only the digits 0, 2, 4, 5 and 6.

0, 2, 5, 20, 25, 45, 50, 65, 200, 205, 225, 245, 250, 255, 450, 500, 502, 505, 650, 665, 2000, 2005, 2050, 2065, 2242, 2245, 2250, 2450, 2500, 2502, 2550, 4500, 5000, 5002, 5005, 5020, 5025, 5045, 5050, 5065, 6500, 6650, 6665, 20000, 20005, 20050, 20065, 20500, 20505, 20602, 20605, 20650, 22420, 22450, 22500, 24500, 24605, 25000, 25005, 25020, 25025

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..1144

J. Wellons, Tables of Shared Digits [archived]

Example

506204065^2 = 256242555422524225.

Mathematica

With[{c={0, 2, 4, 5, 6}}, Select[FromDigits/@Tuples[c, 5], SubsetQ[c, IntegerDigits[ #^2]]&]] (* Harvey P. Dale, May 12 2018 *)

Crossrefs

Sequence in context: A059079 A177494 A136900 * A077138 A247131 A192164

Adjacent sequences: A136895 A136896 A136897 * A136899 A136900 A136901

Keyword

base,nonn

Author

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

Status

approved