A137034 Numbers k such that k and k^2 use only the digits 1, 3, 5, 6 and 8.

1, 6, 56, 81, 816, 1156, 1881, 3656, 8131, 8166, 36316, 81556, 116881, 188556, 581666, 813381, 1163566, 1168581, 1366881, 1888566, 5613656, 11555881, 11668381, 13551316, 18313556, 18353656, 36316156, 36556331, 56138816, 56156331, 58153816, 58168581, 115555881, 135318581, 135513316, 183353656, 368356666, 368535631, 558138566

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..185

J. Wellons, Tables of Shared Digits [archived]

Example

816588565653816^2 = 666816885556556563855555361856.

Mathematica

With[{c={1, 3, 5, 6, 8}}, Table[Select[FromDigits/@Tuples[c, n], SubsetQ[ c, IntegerDigits[ #^2]]&], {n, 9}]]//Flatten (* Harvey P. Dale, Jul 21 2016 *)

Crossrefs

Sequence in context: A137033 A045526 A164579 * A177059 A345473 A053127

Adjacent sequences: A137031 A137032 A137033 * A137035 A137036 A137037

Keyword

base,nonn

Author

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

Status

approved