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A164858 a(n) = largest prime dividing A164857(n). a(1)=1. 2
1, 2, 3, 2, 5, 3, 7, 2, 5, 13, 13, 3, 19, 7, 5, 2, 23, 3, 31, 7, 37, 37, 37, 3, 43, 43, 43, 43, 43, 5, 53, 2, 61, 61, 7, 3, 61, 73, 73, 73, 73, 79, 79, 83, 83, 83, 83, 3, 89, 89, 89, 89, 89, 3, 103, 103, 103, 103, 103, 5, 113, 113, 13, 2, 113, 113, 113, 131, 131, 131, 131, 3, 139 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A164857(n) is divisible by every prime from 2 to A164858(n).

LINKS

Table of n, a(n) for n=1..73.

CROSSREFS

Cf. A055932, A164798, A164799, A164857.

Sequence in context: A163457 A072593 A039635 * A192330 A215041 A081812

Adjacent sequences:  A164855 A164856 A164857 * A164859 A164860 A164861

KEYWORD

nonn

AUTHOR

Leroy Quet, Aug 28 2009

EXTENSIONS

Extended by Ray Chandler, Mar 14 2010

STATUS

approved

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Last modified May 19 11:10 EDT 2013. Contains 225429 sequences.