A137006 Numbers k such that k and k^2 use only the digits 1, 2, 5, 6 and 9.

1, 5, 11, 15, 16, 25, 96, 125, 161, 511, 515, 516, 1119, 1125, 1515, 1619, 2261, 5125, 9619, 9961, 12296, 12511, 12515, 16215, 16296, 22619, 22925, 25525, 25596, 51211, 96211, 112515, 125125, 126211, 126969, 129215, 161125, 161219, 226961, 256169, 262925, 511969, 516296, 956619, 959961, 1119219, 1121125, 1126925, 1252965, 1261965, 1262125

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..420

J. Wellons, Tables of Shared Digits [archived]

Example

126961261519525^2 = 16119161926629219511956225625.

Mathematica

With[{c={1, 2, 5, 6, 9}}, Flatten[Table[FromDigits/@Select[ Tuples[c, n], SubsetQ[ c, IntegerDigits[FromDigits[#]^2]]&], {n, 7}]]] (* Harvey P. Dale, Nov 25 2014 *)

Crossrefs

Sequence in context: A314002 A137004 A137005 * A137003 A314003 A314004

Adjacent sequences: A137003 A137004 A137005 * A137007 A137008 A137009

Keyword

base,nonn

Author

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

Status

approved