A136892 Numbers k such that k and k^2 use only the digits 0, 2, 3, 6 and 7.

0, 6, 26, 60, 260, 600, 606, 2600, 6000, 6006, 6060, 26000, 60000, 60006, 60060, 60600, 260000, 270606, 600000, 600006, 600060, 600600, 606000, 2600000, 2603326, 2706060, 6000000, 6000006, 6000060, 6000600, 6000606, 6006000, 6060000, 6060006, 26000000, 26033260, 27060600, 60000000, 60000006, 60000060, 60000600, 60000606, 60006000

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..558

J. Wellons, Tables of Shared Digits [archived]

Example

600306307363726^2 = 360367662660672272772060603076.

Mathematica

With[{c={0, 2, 3, 6, 7}}, Select[FromDigits/@Tuples[c, 8], SubsetQ[ c, IntegerDigits[ #^2]]&]] (* Harvey P. Dale, Mar 01 2020 *)

Crossrefs

Sequence in context: A166728 A285453 A327713 * A254527 A190095 A135036

Adjacent sequences: A136889 A136890 A136891 * A136893 A136894 A136895

Keyword

base,nonn

Author

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

Status

approved