A137054 - OEIS

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A137054

Numbers k such that k and k^2 use only the digits 1, 4, 6 and 8.

1, 4, 8, 41, 6441, 68444641

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

OFFSET

1,2

COMMENTS

Generated with DrScheme.

LINKS

Table of n, a(n) for n=1..6.

Jonathan Wellons, Tables of Shared Digits [archived]

EXAMPLE

68444641^2 = 4684668881618881.

MATHEMATICA

With[{c={1, 4, 6, 8}}, Select[Flatten[Table[FromDigits/@Tuples[c, n], {n, 8}]], SubsetQ[ c, IntegerDigits[ #^2]]&]] (* Harvey P. Dale, Jan 09 2024 *)

CROSSREFS

Sequence in context: A137047 A137052 A111411 * A338423 A163343 A284972

Adjacent sequences: A137051 A137052 A137053 * A137055 A137056 A137057

KEYWORD

base,nonn,more

AUTHOR

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

STATUS

approved