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A136905 Numbers k such that k and k^2 use only the digits 0, 2, 4, 6 and 9. 1
0, 2, 20, 64, 200, 264, 492, 640, 964, 2000, 2064, 2640, 4902, 4920, 4992, 6400, 9640, 20000, 20602, 20640, 20992, 24992, 26400, 49020, 49200, 49902, 49920, 49992, 64000, 96400, 200000, 206020, 206400, 209920, 209992, 222402, 246962, 249920, 249992, 264000, 490200, 492000, 494262, 494462, 494662, 499002, 499020, 499200, 499902, 499920, 499992 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Generated with DrScheme.
LINKS
EXAMPLE
49642929029462^2 = 2464420402624200949264009444.
MATHEMATICA
With[{c={0, 2, 4, 6, 9}}, Select[FromDigits/@Tuples[c, 6], SubsetQ[ c, IntegerDigits[ #^2]]&]] (* Harvey P. Dale, Sep 21 2017 *)
CROSSREFS
Sequence in context: A133217 A001504 A192351 * A230644 A183907 A216609
KEYWORD
base,nonn
AUTHOR
Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
STATUS
approved

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Last modified February 22 10:17 EST 2024. Contains 370250 sequences. (Running on oeis4.)