A136913 Numbers k such that k and k^2 use only the digits 0, 2, 5, 6 and 8.

0, 5, 25, 50, 225, 250, 255, 500, 505, 825, 2250, 2255, 2500, 2550, 2555, 2585, 2865, 5000, 5005, 5025, 5050, 8250, 22500, 22550, 22805, 22865, 25000, 25005, 25025, 25500, 25505, 25550, 25850, 28650, 50000, 50005, 50025, 50050, 50225, 50250, 50255, 50500, 50555, 50605, 82500, 82585, 82805, 82865, 225000, 225500, 225505, 228050, 228225, 228650

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..1310

J. Wellons, Tables of Shared Digits [archived]

Example

50562656205^2 = 2556582202505025002025.

Mathematica

With[{c={0, 2, 5, 6, 8}}, Select[FromDigits/@Tuples[c, 6], SubsetQ[c, IntegerDigits[#^2]]&]] (* Harvey P. Dale, Mar 18 2026 *)

Crossrefs

Sequence in context: A262760 A290700 A136914 * A136911 A101654 A043106

Adjacent sequences: A136910 A136911 A136912 * A136914 A136915 A136916

Keyword

base,nonn

Author

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

Status

approved