A136969 Numbers k such that k and k^2 use only the digits 1, 2, 3, 4 and 6.

1, 2, 4, 6, 11, 12, 21, 46, 111, 121, 146, 162, 462, 642, 1111, 1146, 1632, 3621, 3642, 4611, 4631, 6642, 11142, 11146, 33632, 34121, 36361, 36642, 46111, 211262, 211332, 334162, 362162, 364231, 461642, 641344, 642131, 643142, 664162, 1111132, 1123131, 1123444, 1124332, 1623642, 1623646, 3334162, 3336332, 3363646, 3621344, 3636361, 4622361

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..479

J. Wellons, Tables of Shared Digits [archived]

Example

642126246413621^2 = 412326116333246316164614331641.

Mathematica

With[{c={1, 2, 3, 4, 6}}, Select[Flatten[Table[FromDigits/@Tuples[c, n], {n, 7}]], SubsetQ[ c, IntegerDigits[#^2]]&]] (* Harvey P. Dale, Jan 31 2021 *)

Crossrefs

Sequence in context: A171921 A030783 A171927 * A292924 A015903 A224860

Adjacent sequences: A136966 A136967 A136968 * A136970 A136971 A136972

Keyword

base,nonn

Author

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

Status

approved