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A136909
Numbers k such that k and k^2 use only the digits 0, 2, 4, 8 and 9.
1
0, 2, 20, 22, 200, 202, 220, 222, 288, 298, 498, 2000, 2002, 2020, 2022, 2200, 2202, 2220, 2880, 2980, 2998, 4980, 4998, 20000, 20002, 20020, 20022, 20200, 20220, 20222, 22000, 22002, 22020, 22200, 22202, 28800, 28998, 29800, 29980, 29998, 44998, 48998, 49800, 49980, 49998, 89498, 200000, 200002, 200020, 200022, 200200, 200202, 200220, 200222
OFFSET
1,2
COMMENTS
Generated with DrScheme.
LINKS
J. Wellons, Tables of Shared Digits [archived]
EXAMPLE
92098040202^2 = 8482049009049208200804.
MATHEMATICA
Module[{c={0, 2, 4, 8, 9}, t}, t=FromDigits/@Tuples[c, 6]; Select[t, SubsetQ[c, IntegerDigits[#^2]]&]] (* Harvey P. Dale, Nov 26 2014 *)
CROSSREFS
Sequence in context: A112405 A136885 A359611 * A169965 A202170 A136908
KEYWORD
base,nonn
AUTHOR
Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
STATUS
approved