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Search: id:A062917
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| A062917 |
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Non-palindromic numbers n such that n is not divisible by 10 and n*R(n) is a square, where R(n) is the reversal of n (A004086). |
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+0
2
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| 144, 169, 288, 441, 528, 768, 825, 867, 882, 961, 1089, 1584, 2178, 4851, 8712, 9801, 10404, 10609, 10989, 12544, 12769, 13104, 14544, 14884, 15984, 20808, 21978, 26208, 27648, 27848, 36828, 40131, 40401, 44521, 44541, 48139, 48841, 48951
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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The sequence has infinitely many terms, some of which can be derived from 1089 and 2178.
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LINKS
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Eric Weisstein's World of Mathematics, Reversal
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EXAMPLE
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2178 is a member as 2178*8712 = 4356^2. 10891089 is a member as 10891089*98019801 = 32673267^2.
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CROSSREFS
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Sequence in context: A044868 A085426 A034289 this_sequence A035090 A064021 A135780
Adjacent sequences: A062914 A062915 A062916 this_sequence A062918 A062919 A062920
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KEYWORD
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nonn,base,easy
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jul 02 2001
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EXTENSIONS
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More terms from Reiner Martin (reinermartin(AT)hotmail.com), Jul 10 2001
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