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A053898
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Numbers n such that n^2 contains only digits {1,4,7}.
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1
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1, 2, 12, 21, 38, 88, 2729, 2036462, 2678521, 1203108962, 343143082067979, 2678520388463521, 1071033028175028538, 2177492084289725902412
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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LINKS
| Author?, Source(txt)
P. De Geest, Squares containing at most three distinct digits, Index entries for related sequences
H. Mishima, Sporadic tridigital solutions
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CROSSREFS
| Cf. A053899.
Sequence in context: A048955 A034049 A073041 * A058413 A053890 A053896
Adjacent sequences: A053895 A053896 A053897 * A053899 A053900 A053901
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KEYWORD
| nonn,base,more
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AUTHOR
| Patrick De Geest (pdg(AT)worldofnumbers.com), Mar 15 2000.
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EXTENSIONS
| More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 04 2005
Four more terms from Mishima's webpage added by Max Alekseyev (maxale(AT)gmail.com), Jan 28 2012
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