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A136856
Numbers k such that k and k^2 use only the digits 0, 1, 4, 5 and 7.
1
0, 1, 10, 71, 100, 710, 1000, 1071, 7100, 7451, 10000, 10701, 10710, 70751, 71000, 74510, 75501, 100000, 100501, 107010, 107100, 107451, 707510, 710000, 745100, 745501, 755010, 1000000, 1005010, 1007001, 1070100, 1071000, 1074510, 4140701, 7075100, 7100000, 7100501, 7451000, 7455010, 7550100, 10000000, 10005001, 10005071, 10050100
OFFSET
1,3
COMMENTS
Generated with DrScheme.
LINKS
Jonathan Wellons, Tables of Shared Digits
EXAMPLE
745050410475701^2 = 555100114150010550401111441401.
CROSSREFS
Cf. A000290.
Sequence in context: A246427 A172499 A215295 * A016218 A026772 A224292
KEYWORD
base,nonn
AUTHOR
Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
STATUS
approved