A136922 Numbers k such that k and k^2 use only the digits 0, 2, 6, 7 and 8.

0, 26, 260, 826, 2600, 8226, 8260, 26000, 82260, 82600, 260000, 280726, 822600, 826000, 2600000, 2767826, 2807260, 7786026, 8226000, 8260000, 26000000, 27678260, 28072600, 28686026, 77860260, 82260000, 82600000, 88672826, 260000000, 276782600, 277288226, 280726000, 286860260, 778602600, 787786026, 820260826, 822600000, 826000000

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..212

J. Wellons, Tables of Shared Digits [archived]

Example

876286270727826^2 = 767877628266080762027770686276.

Mathematica

With[{gr={0, 2, 6, 7, 8}}, Select[FromDigits/@Tuples[gr, 9], SubsetQ[gr, IntegerDigits[ #^2]]&]] (* Harvey P. Dale, Aug 05 2015 *)

Crossrefs

Sequence in context: A125389 A109467 A126547 * A136921 A042308 A251673

Adjacent sequences: A136919 A136920 A136921 * A136923 A136924 A136925

Keyword

base,nonn

Author

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

Status

approved