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Search: id:A094224
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| A094224 |
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Number of digits in the least n-transposable number. |
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+0
3
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OFFSET
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2,1
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COMMENT
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A k-transposable number, where 2<=k<=9, is one which is equal to k times the number whose digits are a cyclic permutation of its leftmost digit to the right.
Corresponds to the least value m+1 such that 10*n-1 |10^m - n, or merely to the order of 10 mod (10*n-1). - Lekraj Beedassy (blekraj(AT)yahoo.com), Aug 21 2004
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REFERENCES
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P. Tougne, "Jeux Mathematiques", Prob. 8, pp. 104 and 107 Aug. 1982 issue of Pour La Science (French edition of 'Scientific American'), Paris.
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LINKS
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K. Matthews, Finding the order a (mod m)
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EXAMPLE
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We have the a(4)=6-digit 4-transposable number 410256=4*102564.
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CROSSREFS
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Sequence in context: A065751 A038632 A138336 this_sequence A128858 A117101 A063840
Adjacent sequences: A094221 A094222 A094223 this_sequence A094225 A094226 A094227
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KEYWORD
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fini,nonn,base
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AUTHOR
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Lekraj Beedassy (blekraj(AT)yahoo.com), May 28 2004
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