A136885 Numbers k such that k and k^2 use only the digits 0, 2, 3, 4 and 8.

0, 2, 20, 22, 48, 200, 202, 220, 480, 482, 2000, 2002, 2020, 2022, 2200, 2202, 2832, 4482, 4800, 4820, 4832, 20000, 20002, 20020, 20022, 20200, 20220, 20838, 22000, 22002, 22020, 28320, 28338, 44820, 48000, 48200, 48202, 48302, 48320, 200000, 200002, 200020, 200022, 200200, 200202, 200220, 202000, 202002, 202200, 208332, 208380, 220000, 220002

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..1123

J. Wellons, Tables of Shared Digits [archived]

Example

4840808040202^2 = 23433422482084328048200804.

Mathematica

With[{c={0, 2, 3, 4, 8}}, Select[FromDigits/@Tuples[c, 6], SubsetQ[c, IntegerDigits[#^2]]&]] (* Harvey P. Dale, Oct 13 2025 *)

Crossrefs

Sequence in context: A022372 A322964 A112405 * A359611 A136909 A169965

Adjacent sequences: A136882 A136883 A136884 * A136886 A136887 A136888

Keyword

base,nonn

Author

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

Status

approved