A137132 Numbers k such that k and k^2 use only the digits 3, 5, 6, 7 and 8.

6, 76, 766, 876, 7666, 8566, 8756, 8876, 57756, 76576, 76666, 85666, 753576, 766576, 766666, 856666, 7587856, 7666576, 7666666, 8566666, 8576576, 8765766, 75336356, 76666576, 76666666, 85666666, 87558876, 88536356, 577558376, 577566756, 577653576, 758733376, 765883566, 766666576, 766666666, 767383566, 856666666, 857768376

Offset

1,1

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n=1..122

Jonathan Wellons, Tables of Shared Digits [archived]

Example

765738688383876^2 = 586355738887858753336736783376.

Mathematica

With[{c={3, 5, 6, 7, 8}}, Select[FromDigits/@Flatten[Table[Tuples[c, n], {n, 9}], 1], SubsetQ[c, IntegerDigits[#^2]]&]] (* Harvey P. Dale, Feb 19 2018 *)

Crossrefs

Sequence in context: A016090 A181343 A241072 * A053337 A199026 A155643

Adjacent sequences: A137129 A137130 A137131 * A137133 A137134 A137135

Keyword

base,nonn

Author

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

Status

approved