A164858 a(n) = largest prime dividing A164857(n). a(1)=1.

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

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: A039635 A303077 A347619 * A192330 A320028 A327076

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