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A087173 Smallest prime factor of n-th partition number. 3
1, 2, 3, 5, 7, 11, 3, 2, 2, 2, 2, 7, 101, 3, 2, 3, 3, 5, 2, 3, 2, 2, 5, 3, 2, 2, 2, 2, 5, 2, 2, 3, 3, 2, 3, 17977, 7, 5, 3, 2, 3, 2, 3, 5, 2, 2, 2, 3, 5, 2, 3, 3, 3, 5, 2, 11, 2, 2, 2, 17, 3, 2, 3, 2, 2, 2, 1181, 3, 5, 2, 3, 11, 23, 2, 2, 7, 10619863, 2, 2, 2, 11, 5, 7, 2, 11, 2, 11, 3, 5, 2473 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) = A020639(A000041(n)).

LINKS

Giovanni Resta, Table of n, a(n) for n = 1..10000

Eric Weisstein's World of Mathematics, Least Prime Factor

Eric Weisstein's World of Mathematics, Partition Function

Eric Weisstein's World of Mathematics, Partition P Congruences

EXAMPLE

A000041(100) = 190569292 = 2*2*43*59*89*211, therefore a(100)=2.

CROSSREFS

Cf. A071963.

Sequence in context: A194261 A194262 A039710 * A179335 A097858 A084408

Adjacent sequences:  A087170 A087171 A087172 * A087174 A087175 A087176

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Aug 23 2003

STATUS

approved

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Last modified April 21 10:03 EDT 2019. Contains 322328 sequences. (Running on oeis4.)