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A046460 Number of prime factors of concatenation of numbers from 1 up to n, with multiplicity. +0
12
1, 3, 2, 2, 3, 8, 2, 5, 4, 3, 6, 6, 3, 3, 3, 4, 5, 6, 6, 10, 8, 6, 4, 6, 5, 9, 8, 7, 4, 7, 3, 6, 6, 2, 8, 9, 4, 4, 6, 9, 5, 7, 4, 7, 10, 7, 5, 8, 6, 10, 3, 9, 8, 14, 5, 5, 6, 4, 4, 8, 3, 8, 5, 10 (list; graph; listen)
OFFSET

0,2

REFERENCES

M. Fleuren, Smarandache Factors and Reverse Factors, Smarandache Notions Journal, 10 (No. 1-2-3, Spring 1999), 5-38.

LINKS

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

CROSSREFS

Cf. A007908, A046461-A046468, A050677.

Sequence in context: A029246 A059942 A032450 this_sequence A117643 A111739 A058743

Adjacent sequences: A046457 A046458 A046459 this_sequence A046461 A046462 A046463

KEYWORD

nonn,hard,base

AUTHOR

Patrick De Geest (pdg(AT)worldofnumbers.com), Aug 15 1998.

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Last modified September 5 19:27 EDT 2008. Contains 143485 sequences.


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