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A136933
Numbers k such that k and k^2 use only the digits 0, 3, 4, 7 and 8.
1
0, 88, 878, 880, 8780, 8800, 87800, 88000, 878000, 880000, 8387078, 8780000, 8800000, 83870780, 87800000, 88000000, 838707800, 878000000, 880000000, 8387078000, 8780000000, 8800000000, 8833878448, 83870780000, 87774340088, 87800000000, 88000000000, 88004400088, 88338784480, 838707800000, 877743400880, 878000000000, 880000000000
OFFSET
1,2
COMMENTS
Generated with DrScheme.
LINKS
J. Wellons, Tables of Shared Digits [archived]
EXAMPLE
84088488438078^2 = 7070873887800777484040334084.
MATHEMATICA
With[{c={0, 3, 4, 7, 8}}, Select[FromDigits/@Tuples[c, 12], SubsetQ[c, IntegerDigits[#^2]]&]] (* Harvey P. Dale, Nov 04 2023 *)
CROSSREFS
Sequence in context: A194651 A072432 A136951 * A136958 A137049 A157730
KEYWORD
base,nonn
AUTHOR
Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
STATUS
approved