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Search: id:A030287
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| A030287 |
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Digits of a(n)^2 do not appear in a(n-1)^2. |
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+0
1
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| 0, 1, 2, 3, 4, 5, 6, 7, 9, 15, 19, 20, 23, 26, 29, 30, 34, 47, 56, 65, 83, 85, 90, 156, 241, 264, 265, 291, 300, 334, 448, 563, 638, 715, 780, 961, 2000, 2261, 2457, 3335, 5478, 7154, 9128, 9569, 14220, 17654, 20000, 22609, 26462, 28604, 30000
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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a(n)=sqrt(A030288(n)) - Zak Seidov (zakseidov(AT)yahoo.com), Feb 20 2009
Next terms <37*10^8: 55784, 85270, 90062, 95000, 105426, 141435, 210042, 223827, 247738, 283000, 333334, 447247, 557794, 707497, 781776, 895550, 1055056, 1414245, 1764844, 2236267, 2472194, 2830000, 3333334, 4472228, 7184474, 8944297, 10543319, 14142947, 17645146, 20000000, 22607767, 54800000, 71492137, 200000000, 226077667, 264639448, 284800227, 548000000, 714920359, 2000000000, 2260776677. - Zak Seidov (zakseidov(AT)yahoo.com), Feb 20 2009
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CROSSREFS
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Cf. A030288 = squares whose digits do not appear in previous term.
Sequence in context: A143286 A160339 A033072 this_sequence A030153 A039126 A083376
Adjacent sequences: A030284 A030285 A030286 this_sequence A030288 A030289 A030290
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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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EXTENSIONS
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Edited by N. J. A. Sloane, (njas(AT)research.att.com), Feb 22 2009 at the suggestion of R. J. Mathar
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