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Search: id:A130448
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| A130448 |
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Squares whose decimal representation contains no substring which is a square. |
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+0
2
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| 1, 4, 9, 25, 36, 576, 676, 7056, 80656, 665856, 2027776, 2802276, 22282727076, 77770707876, 78807087076, 7888885568656, 8782782707776, 72822772707876, 555006880085056, 782280288087076, 827702888070276, 888288787822276
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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The digits in the substring do not have to be adjacemt.
Is this sequence finite and if so what is the last term?
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EXAMPLE
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576 is in the list because none of the substrings 5, 7, 6, 57, 76 or 56 is a square number.
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CROSSREFS
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Cf. A131599.
Sequence in context: A087058 A046659 A063760 this_sequence A046451 A158142 A158143
Adjacent sequences: A130445 A130446 A130447 this_sequence A130449 A130450 A130451
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KEYWORD
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base,nonn
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AUTHOR
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Martin Raab (raab-martin(AT)gmx.de), Aug 07 2007
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EXTENSIONS
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Edited by N. J. A. Sloane (njas(AT)research.att.com), Sep 14 2007
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