A136889 Numbers k such that k and k^2 use only the digits 0, 2, 3, 5 and 7.

0, 5, 50, 55, 235, 500, 505, 550, 755, 2350, 5000, 5005, 5050, 5055, 5500, 5505, 7550, 23500, 50000, 50005, 50050, 50055, 50235, 50500, 50505, 50550, 55000, 55005, 55050, 57055, 57735, 72335, 73055, 75500, 223735, 235000, 235005, 235235, 500000, 500005, 500050, 500055, 500235, 500500, 500505, 500550, 500755, 502350, 505000, 505005, 505050, 505500

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..1062

J. Wellons, Tables of Shared Digits [archived]

Example

75720230505^2 = 5733553307730332555025.

Mathematica

Module[{c={0, 2, 3, 5, 7}, t1}, t1=FromDigits/@Tuples[c, 6]; Select[t1, SubsetQ[ c, IntegerDigits[#^2]]&]] (* Harvey P. Dale, Mar 29 2022 *)

Crossrefs

Sequence in context: A059008 A218290 A136890 * A136887 A169964 A061474

Adjacent sequences: A136886 A136887 A136888 * A136890 A136891 A136892

Keyword

base,nonn,changed

Author

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

Status

approved