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Search: id:A141286
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| A141286 |
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a(n) = the smallest positive multiple of n such that a(n) is divisible by A001222(a(n)), where A001222(m) is the sum of the exponents in the prime factorization of m. |
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1
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| 2, 2, 3, 4, 5, 6, 7, 16, 18, 10, 11, 12, 13, 14, 30, 16, 17, 18, 19, 40, 42, 22, 23, 24, 75
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OFFSET
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1,1
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EXAMPLE
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For n = 25, checking: 1*25 = 25 = 5^2. The sum of the exponents in the prime-factorization of 5^2 is 2. 2 does not divide 25. 2*25 = 50 = 2^1 *5^2. The sum of the exponents is 1+2=3. 3 does not divide 50. 3*25 = 75 = 3^1 *5^2. The sum of the exponents is 3. Now, 3 does divide 75. So a(25) = 75.
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CROSSREFS
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Cf. A001222.
Sequence in context: A100665 A114095 A066639 this_sequence A025209 A125573 A034139
Adjacent sequences: A141283 A141284 A141285 this_sequence A141287 A141288 A141289
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KEYWORD
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more,nonn
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AUTHOR
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Leroy Quet (q1qq2qqq3qqqq(AT)yahoo.com), Aug 01 2008
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