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A136862
Numbers k such that k and k^2 use only the digits 0, 1, 4, 6 and 9.
1
0, 1, 4, 10, 14, 40, 64, 100, 119, 140, 400, 640, 949, 1000, 1046, 1049, 1190, 1400, 4000, 4119, 6400, 9490, 10000, 10199, 10460, 10490, 10496, 10696, 11900, 14000, 40000, 40499, 40614, 41190, 44114, 64000, 64064, 64114, 94900, 94969, 100000, 100449, 100469, 100496, 100499, 100946, 101990, 104496, 104600, 104900, 104960, 106960, 119000, 140000
OFFSET
1,3
COMMENTS
Generated with DrScheme.
LINKS
J. Wellons, Tables of Shared Digits [archived]
EXAMPLE
10461401416969^2 = 109440919606961001001146961.
MATHEMATICA
With[{c={0, 1, 4, 6, 9}}, Select[FromDigits/@Tuples[c, 6], SubsetQ[c, IntegerDigits[ #^2]]&]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Mar 11 2017 *)
CROSSREFS
Sequence in context: A365679 A175588 A239788 * A191635 A123925 A310425
KEYWORD
base,nonn
AUTHOR
Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
STATUS
approved