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A137042 Numbers n such that n and the square of n use only the digits 1, 3, 6 and 9. 0
1, 3, 6, 13, 19, 31, 63, 369, 31131, 969119 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Generated with DrScheme

LINKS

Table of n, a(n) for n=1..10.

J. Wellons, Tables of Shared Digits

EXAMPLE

969119^2 = 939191636161

MATHEMATICA

With[{c={1, 3, 6, 9}}, Table[Select[FromDigits/@Tuples[c, n], SubsetQ[c, IntegerDigits[ #^2]]&], {n, 6}]]//Flatten (* Harvey P. Dale, Nov 17 2018 *)

CROSSREFS

Sequence in context: A263621 A137039 A137035 * A080546 A080554 A259583

Adjacent sequences:  A137039 A137040 A137041 * A137043 A137044 A137045

KEYWORD

base,nonn

AUTHOR

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

STATUS

approved

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Last modified August 7 04:39 EDT 2020. Contains 336274 sequences. (Running on oeis4.)