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A053899
Squares composed of digits {1,4,7}.
+0
3
1, 4, 144, 441, 1444, 7744, 7447441, 4147177477444, 7174474747441, 1447471174444717444
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Maintained by
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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.
AT&T Labs Research
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