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Search: id:A070246
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| A070246 |
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LCM(n,R(n)) / GCD(n,R(n)), where R(n) (A004086) is the digit reversal of n. |
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+0
1
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| 1, 1, 1, 1, 1, 1, 1, 1, 1, 10, 1, 28, 403, 574, 85, 976, 1207, 18, 1729, 10, 28, 1, 736, 28, 1300, 403, 24, 574, 2668, 10, 403, 736, 1, 1462, 1855, 28, 2701, 3154, 403, 10, 574, 28, 1462, 1, 30, 736, 3478, 28, 4606, 10, 85, 1300, 1855, 30, 1, 3640, 475, 4930, 5605
(list; graph; listen)
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OFFSET
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1,10
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COMMENT
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a(1) = 1, a(18) = 18. Are there more terms for which a(k) = k?
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EXAMPLE
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a(12) = LCM(12,21)/GCD(12,21) = 84/3 = 28.
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MATHEMATICA
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r[n_] := FromDigits[ Reverse[ IntegerDigits[n]]]; Table[ LCM[n, r[n]] / GCD[n, r[n]], {n, 1, 65}]
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CROSSREFS
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Sequence in context: A036188 A013617 A050999 this_sequence A085044 A059022 A115097
Adjacent sequences: A070243 A070244 A070245 this_sequence A070247 A070248 A070249
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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), May 09 2002
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EXTENSIONS
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Edited by Robert G. Wilson v (rgwv(AT)rgwv.com), May 10 2002
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