A136810 Numbers k such that k and k^2 use only the digits 0, 1, 2, 3 and 4.

0, 1, 2, 10, 11, 12, 20, 21, 32, 100, 101, 102, 110, 111, 120, 200, 201, 210, 320, 321, 332, 1000, 1001, 1002, 1010, 1011, 1012, 1020, 1021, 1100, 1101, 1102, 1110, 1111, 1200, 1201, 2000, 2001, 2010, 2011, 2100, 2101, 3200, 3210, 3320, 3332, 10000, 10001, 10002, 10010, 10011, 10012, 10020, 10021, 10100, 10101, 10110, 10111, 10120, 10200, 10210, 11000

Offset

1,3

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..1754 (* All terms with 10 or fewer digits. *)

J. Wellons, Tables of Shared Digits [archived]

Example

3230203421^2 = 10434214141040103241.

Mathematica

With[{c={0, 1, 2, 3, 4}}, Select[FromDigits/@Tuples[c, 5], SubsetQ[c, IntegerDigits[#^2]]&]] (* Harvey P. Dale, Dec 02 2025 *)

Crossrefs

Cf. A158304.

Sequence in context: A159952 A136820 A256437 * A136821 A381579 A105116

Adjacent sequences: A136807 A136808 A136809 * A136811 A136812 A136813

Keyword

base,nonn

Author

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

Extensions

Parenthetical comment added to first link by Harvey P. Dale, Dec 02 2025

Status

approved