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Search: id:A050676
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| A050676 |
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Let b(n) = number of prime factors (with multiplicity) of concatenation of numbers from 1 to n; sequence gives smallest number m with b(m) = n. |
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+0
2
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OFFSET
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1,2
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REFERENCES
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M. Fleuren, Smarandache Factors and Reverse Factors, Smarandache Notions Journal, 10 (No. 1-2-3, Spring 1999), 5-38.
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LINKS
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P. De Geest, Normal Smarandache Concatenated Numbers, Prime factors from 1 up to n
M. L. Perez et al., eds., Smarandache Notions Journal
C. Rivera, Primes by Listing
M. Fleuren, Factors and primes of Smarandache sequences.
M. Fleuren, Smarandache Factors and Reverse factors
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CROSSREFS
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Cf. A007908, A050678, A046460.
Sequence in context: A159588 A118045 A081233 this_sequence A010372 A152049 A099887
Adjacent sequences: A050673 A050674 A050675 this_sequence A050677 A050678 A050679
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KEYWORD
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nonn,base,hard
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AUTHOR
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Patrick De Geest (pdg(AT)worldofnumbers.com), Aug 15 1999.
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