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A136854 Numbers k such that k and k^2 use only the digits 0, 1, 4 and 5. 1
0, 1, 10, 100, 1000, 10000, 100000, 100501, 1000000, 1005010, 10000000, 10005001, 10050100, 100000000, 100050010, 100501000, 1000000000, 1000050001, 1000500100, 1005010000, 10000000000, 10000500010, 10005001000, 10050100000, 100000000000, 100000500001, 100005000100, 100050010000, 100501000000, 1000000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Generated with DrScheme.

LINKS

Jonathan Wellons, Table of n, a(n) for n = 1..46

Jonathan Wellons, Tables of Shared Digits

EXAMPLE

100501000000000^2 = 10100451001000000000000000000.

MATHEMATICA

With[{c={0, 1, 4, 5}}, Select[FromDigits/@Tuples[c, 13], SubsetQ[c, IntegerDigits[ #^2]]&]] (* Harvey P. Dale, Apr 15 2018 *)

CROSSREFS

Cf. A000290.

Sequence in context: A136845 A272503 A136837 * A029778 A029795 A136844

Adjacent sequences:  A136851 A136852 A136853 * A136855 A136856 A136857

KEYWORD

base,nonn

AUTHOR

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

STATUS

approved

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Last modified September 17 19:06 EDT 2021. Contains 347489 sequences. (Running on oeis4.)