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Search: id:A066371
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| A066371 |
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Smallest positive square that contains n consecutive internal 0's. |
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+0
3
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| 1, 1024, 60025, 1560001, 39000025, 1900000921, 460000002289, 2441400000004, 381470000000049
(list; graph; listen)
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OFFSET
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0,2
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EXAMPLE
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a(2)= 60025 since 60025 is square and contains 2 consecutive internal 0's.
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MATHEMATICA
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Do[k = Floor[10^(n/2)]; While[a = Flatten[ Position[ IntegerDigits[k^2], 0]]; Mod[k, 10] == 0 || Length[a] < n || Last[a] - First[a] + 1 != n, k++ ]; Print[k^2], {n, 0, 8} ]
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CROSSREFS
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Square roots are in A066392.
Sequence in context: A030629 A056587 A134847 this_sequence A016961 A017033 A017117
Adjacent sequences: A066368 A066369 A066370 this_sequence A066372 A066373 A066374
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KEYWORD
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base,nonn
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AUTHOR
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Erich Friedman (efriedma(AT)stetson.edu), Dec 22 2001
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Dec 23 2001
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