A137017 Numbers k such that k and k^2 use only the digits 1, 2, 6 and 9.

1, 11, 96, 1619, 126969

Offset

1,2

Comments

Generated with DrScheme.

No additional terms through 9999999999. - Harvey P. Dale, Mar 31 2014

Links

Table of n, a(n) for n=1..5.

J. Wellons, Tables of Shared Digits [archived]

Example

126969^2 = 16121126961.

Mathematica

Flatten[Table[Select[FromDigits/@Tuples[{1, 2, 6, 9}, i], Total[ Table[ DigitCount[ #^2, 10, n], {n, {3, 4, 5, 7, 8, 0}}]]==0&], {i, 10}]] (* Harvey P. Dale, Mar 31 2014 *)

Crossrefs

Sequence in context: A294724 A115351 A154997 * A133833 A142260 A016140

Adjacent sequences: A137014 A137015 A137016 * A137018 A137019 A137020

Keyword

base,nonn,changed

Author

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

Status

approved