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A137017
Numbers k such that k and k^2 use only the digits 1, 2, 6 and 9.
0
1, 11, 96, 1619, 126969
OFFSET
1,2
COMMENTS
Generated with DrScheme.
No additional terms through 9999999999. - Harvey P. Dale, Mar 31 2014
LINKS
EXAMPLE
126969^2 = 16121126961.
MATHEMATICA
Flatten[Table[Select[FromDigits/@Tuples[{1, 2, 6, 9}, i], Total[ Table[ DigitCount[ #^2, 10, n], {n, {3, 4, 5, 7, 8, 0}}]]==0&], {i, 10}]] (* Harvey P. Dale, Mar 31 2014 *)
CROSSREFS
Sequence in context: A294724 A115351 A154997 * A133833 A142260 A016140
KEYWORD
base,nonn,more
AUTHOR
Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
STATUS
approved