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Search: id:A109930
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| A109930 |
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Least palindromic multiple of concatenation 1,2,3,...n-1,n,n-1,...3,2,1. |
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+0
1
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| 2, 242, 24642, 2468642, 1357997531, 1123454543211, 112345656543211, 11234567676543211, 1123456787876543211, 112345678989876543211, 1122345678989898765432211, 11223345678989898987654332211
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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If c represents the concatenation then a(n) = m*c where m > 1.
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EXAMPLE
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a(5) = 1357997531= 11*123454321.
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CROSSREFS
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Sequence in context: A055968 A074256 A146312 this_sequence A013509 A013505 A049333
Adjacent sequences: A109927 A109928 A109929 this_sequence A109931 A109932 A109933
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KEYWORD
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base,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jul 18 2005
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EXTENSIONS
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More terms from Rick L. Shepherd (rshepherd2(AT)hotmail.com), Jul 22 2005
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