A136988 Numbers k such that k and k^2 use only the digits 1, 2, 4, 5 and 6.

1, 2, 4, 5, 11, 12, 15, 16, 21, 25, 46, 65, 112, 121, 125, 162, 211, 215, 216, 254, 461, 465, 511, 512, 515, 516, 642, 665, 1116, 1121, 1125, 1211, 1242, 1246, 1454, 1465, 1616, 2125, 2261, 2262, 5121, 5125, 5162, 6415, 6454, 6515, 6642, 6665, 11142, 11254, 12511, 12515, 16262, 21125, 21242, 25525, 51211, 51246, 51616, 65125, 66515, 66642, 66665, 111465

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..980

J. Wellons, Tables of Shared Digits [archived]

Example

645145151616461^2 = 416212266654226451241246164521.

Mathematica

Module[{nn=6, c={1, 2, 4, 5, 6}}, Select[Flatten[Table[FromDigits/@Tuples[c, n], {n, nn}]], SubsetQ[ c, IntegerDigits[#^2]]&]] (* Harvey P. Dale, Jun 16 2023 *)

Crossrefs

Sequence in context: A296346 A089409 A287269 * A074725 A292412 A113733

Adjacent sequences: A136985 A136986 A136987 * A136989 A136990 A136991

Keyword

base,nonn

Author

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

Status

approved