A136901 Numbers k such that k and k^2 use only the digits 0, 2, 4, 5 and 9.

0, 2, 5, 20, 45, 50, 95, 200, 205, 450, 495, 500, 502, 505, 950, 995, 2000, 2005, 2050, 2245, 4495, 4500, 4505, 4905, 4950, 4955, 4995, 5000, 5002, 5005, 5020, 5045, 5050, 5095, 9500, 9950, 9995, 20000, 20005, 20050, 20495, 20500, 20505, 22450, 44950, 44955, 44995, 45000, 45005, 45045, 45050, 49050, 49500, 49550, 49905, 49950, 49955, 49995, 50000

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..1132

J. Wellons, Tables of Shared Digits

Example

542450205^2 = 294252224904542025.

Mathematica

With[{c={0, 2, 4, 5, 9}}, Select[FromDigits/@Tuples[c, 5], SubsetQ[ c, IntegerDigits[ #^2]]&]] (* Harvey P. Dale, Jan 28 2019 *)

Crossrefs

Sequence in context: A185593 A136899 A136882 * A136897 A098510 A168541

Adjacent sequences: A136898 A136899 A136900 * A136902 A136903 A136904

Keyword

base,nonn

Author

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

Status

approved