A137109 Numbers n such that n and the square of n use only the digits 2, 4, 8 and 9.

2, 22, 222, 288, 49898882, 499898882

Offset

1,1

Comments

Generated with DrScheme

No additional terms up to 10^12. - Harvey P. Dale, Oct 11 2017

Links

Table of n, a(n) for n=1..6.

J. Wellons, Tables of Shared Digits [archived]

Example

499898882^2 = 249898892224849924

Mathematica

With[{c={2, 4, 8, 9}}, Select[FromDigits/@Flatten[Table[Tuples[c, n], {n, 10}], 1], SubsetQ[c, IntegerDigits[#^2]]&]] (* Harvey P. Dale, Oct 11 2017 *)

Crossrefs

Sequence in context: A336894 A037567 A174200 * A002276 A112893 A086855

Adjacent sequences: A137106 A137107 A137108 * A137110 A137111 A137112

Keyword

base,nonn,changed

Author

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

Status

approved