A137044 - OEIS

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A137044

Numbers k such that k and k^2 use only the digits 1, 3, 8 and 9.

1, 3, 9, 1998333891

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

OFFSET

1,2

COMMENTS

Generated with DrScheme.

LINKS

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

Jonathan Wellons, Tables of Shared Digits [archived]

EXAMPLE

1998333891^2 = 3993338339919199881.

MATHEMATICA

With[{c={1, 3, 8, 9}}, Select[Flatten[Table[FromDigits/@Tuples[c, n], {n, 10}]], SubsetQ[c, IntegerDigits[#^2]]&]] (* Harvey P. Dale, Dec 04 2018 *)

CROSSREFS

Sequence in context: A116620 A057269 A113116 * A188545 A336747 A212361

Adjacent sequences: A137041 A137042 A137043 * A137045 A137046 A137047

KEYWORD

base,nonn,more

AUTHOR

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

STATUS

approved