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A136891
Numbers k such that k and k^2 use only the digits 0, 2, 3, 5 and 9.
1
0, 3, 5, 23, 30, 50, 55, 95, 230, 235, 300, 305, 500, 503, 505, 550, 950, 995, 2300, 2350, 3000, 3005, 3050, 3055, 5000, 5003, 5005, 5023, 5030, 5050, 5055, 5095, 5500, 5505, 5523, 9500, 9950, 9995, 23000, 23005, 23500, 30000, 30005, 30050, 30055, 30500, 30505, 30550, 50000, 50003, 50005, 50023, 50030, 50050, 50055, 50095, 50230, 50235, 50300
OFFSET
1,2
COMMENTS
Generated with DrScheme.
LINKS
J. Wellons, Tables of Shared Digits [archived]
EXAMPLE
5390305205^2 = 29055390203050092025.
MATHEMATICA
With[{c={0, 2, 3, 5, 9}}, Select[FromDigits/@Tuples[c, 5], SubsetQ[c, IntegerDigits[ #^2]]&]] (* Harvey P. Dale, Jun 21 2021 *)
CROSSREFS
Sequence in context: A271347 A222424 A067256 * A296920 A106857 A106307
KEYWORD
base,nonn
AUTHOR
Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
STATUS
approved