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A136983
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Numbers n such that n and the square of n use only the digits 1, 2, 3, 7 and 9.
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1
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1, 3, 11, 27, 111, 139, 173, 177, 373, 1139, 1339, 1927, 2777, 3373, 11123, 13123, 17123, 17923, 17927, 19777, 27927, 117123, 133123, 173139, 193373, 199277, 279177, 312911, 373139, 1127927, 1131339, 1312239, 1392739, 1712373, 1771777, 1771923, 1792739, 1799277, 1933177, 1977911, 1977923, 1993223, 1997927, 2792739, 3731927, 11122939
(list; graph; refs; listen; history; internal format)
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