A136923 Numbers k such that k and k^2 use only the digits 0, 2, 6, 7 and 9.

0, 26, 27, 260, 270, 277, 2600, 2700, 2770, 26000, 27000, 27700, 96026, 96277, 260000, 266077, 269777, 270000, 277000, 960260, 962770, 996026, 2600000, 2660770, 2696277, 2697770, 2700000, 2770000, 9602600, 9627700, 9960260, 26000000, 26607700, 26962770, 26977700, 27000000, 27700000, 27706077, 96026000, 96276726, 96277000, 99602600

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..267

J. Wellons, Tables of Shared Digits [archived]

Example

962692626266077^2 = 926777092667076607767200969929.

Mathematica

With[{c={0, 2, 6, 7, 9}}, Select[FromDigits/@Tuples[c, 8], SubsetQ[c, IntegerDigits[ #^2]]&]] (* Harvey P. Dale, Aug 15 2022 *)

Crossrefs

Sequence in context: A042388 A042390 A042392 * A042394 A137118 A137119

Adjacent sequences: A136920 A136921 A136922 * A136924 A136925 A136926

Keyword

base,nonn

Author

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

Status

approved