A136887 Numbers k such that k and k^2 use only the digits 0, 2, 3 and 5.

0, 5, 50, 55, 235, 500, 505, 550, 2350, 5000, 5005, 5050, 5055, 5500, 5505, 23500, 50000, 50005, 50050, 50055, 50235, 50500, 50550, 55000, 55005, 55050, 235000, 235235, 500000, 500005, 500050, 500055, 500235, 500500, 500505, 500550, 502350, 505000, 505005, 505500, 505505, 550000, 550005, 550050, 550500, 2350000, 2350005, 2352350, 5000000

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..1292

J. Wellons, Tables of Shared Digits [archived]

Example

5005020505005^2 = 25050230255520505230050025.

Mathematica

With[{c={0, 2, 3, 5}}, Select[FromDigits/@Tuples[c, 7], SubsetQ[c, IntegerDigits[ #^2]]&]] (* Harvey P. Dale, Dec 18 2018 *)

Crossrefs

Sequence in context: A218290 A136890 A136889 * A169964 A061474 A136916

Adjacent sequences: A136884 A136885 A136886 * A136888 A136889 A136890

Keyword

base,nonn,changed

Author

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

Status

approved