A137115 - OEIS

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A137115

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

5, 25, 22925, 22955665

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Generated with DrScheme.

No additional terms up to 10^11. - Harvey P. Dale, Mar 12 2018

LINKS

Table of n, a(n) for n=1..4.

Jonathan Wellons, Tables of Shared Digits [archived]

EXAMPLE

22955665^2 = 526962555592225.

MATHEMATICA

With[{c={2, 5, 6, 9}}, Select[Flatten[Table[FromDigits/@Tuples[c, n], {n, 9}]], SubsetQ[c, IntegerDigits[#^2]]&]] (* Harvey P. Dale, Mar 12 2018 *)

CROSSREFS

Sequence in context: A033981 A099077 A137113 * A060063 A106295 A057688

Adjacent sequences: A137112 A137113 A137114 * A137116 A137117 A137118

KEYWORD

base,nonn,more

AUTHOR

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

STATUS

approved