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Search: id:A050681
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A050681 Positions of 4's in A050677. +0
1
8, 14, 16, 19, 21, 23, 37, 57 (list; graph; listen)
OFFSET

0,1

REFERENCES

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

LINKS

P. De Geest, Reversed Smarandache Concatenated Numbers, Prime factors from n down to 1

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. A000422, A050677, A046463.

Sequence in context: A092537 A082772 A103338 this_sequence A084021 A114456 A138666

Adjacent sequences: A050678 A050679 A050680 this_sequence A050682 A050683 A050684

KEYWORD

nonn,base,hard

AUTHOR

Patrick De Geest (pdg(AT)worldofnumbers.com), Aug 15 1999.

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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