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Search: id:A029783
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| A029783 |
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Exclusionary squares: numbers n such that digits of n are not present in n^2. |
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+0
7
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| 2, 3, 4, 7, 8, 9, 17, 18, 22, 24, 29, 33, 34, 38, 39, 44, 47, 53, 54, 57, 58, 59, 62, 67, 72, 77, 79, 84, 88, 92, 94, 144, 157, 158, 173, 187, 188, 192, 194, 209, 212, 224, 237, 238, 244, 247, 253, 257, 259, 307, 313, 314, 333, 334, 338, 349, 353, 359
(list; graph; listen)
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OFFSET
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1,1
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REFERENCES
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Clifford A. Pickover, A Passion for Mathematics, Wiley, 2005; see p. 60.
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MATHEMATICA
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Select[Range[1000], Intersection[IntegerDigits[ # ], IntegerDigits[ #^2]] == {} &] - Tanya Khovanova (tanyakh(AT)yahoo.com), Dec 25 2006
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CROSSREFS
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Cf. A059930 = numbers n such that n and n^2 combined use different digits, A112736 = numbers whose squares are exclusionary.
Sequence in context: A023774 A152037 A058075 this_sequence A112736 A059930 A125965
Adjacent sequences: A029780 A029781 A029782 this_sequence A029784 A029785 A029786
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KEYWORD
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nonn,base
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AUTHOR
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Patrick De Geest (pdg(AT)worldofnumbers.com)
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