A137114 Numbers k such that k and k^2 use only the digits 2, 5, 6, 8 and 9.

5, 25, 925, 2585, 2925, 22925, 25665, 25865, 28685, 28686, 228685, 256565, 258565, 828665, 925525, 925665, 926565, 962585, 2286685, 2299686, 2925525, 2926925, 9266565, 22866685, 22866925, 22925865, 22955585, 22955665, 25662585, 28686685, 29266925, 29296585, 29825865, 29882585, 29926565, 82882585, 92566565, 92895565, 96259685

Offset

1,1

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..230

J. Wellons, Tables of Shared Digits [archived]

Example

829629856598686^2 = 688285698959956296296856926596.

Mathematica

Module[{c={2, 5, 6, 8, 9}}, Table[Select[FromDigits/@Tuples[c, n], SubsetQ[ c, IntegerDigits[#^2]]&], {n, 8}]]//Flatten (* Harvey P. Dale, Oct 21 2016 *)

Crossrefs

Sequence in context: A169652 A359232 A359235 * A067212 A061583 A278120

Adjacent sequences: A137111 A137112 A137113 * A137115 A137116 A137117

Keyword

base,nonn

Author

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

Status

approved