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A178775 Smallest prime factors of zerofull restricted pandigital numbers. 3
3, 2, 3, 3, 2, 3, 3, 2, 3, 2, 2, 2, 3, 3, 3, 2, 3, 2, 2, 3, 2, 2, 3, 2, 3, 2, 3, 3, 2, 3, 3, 2, 3, 3, 2, 3, 3, 3, 3, 3, 3, 3, 2, 3, 2, 3, 3, 3, 3, 2, 3, 2, 2, 2, 3, 2, 3, 3, 2, 3, 3, 2, 3, 3, 2, 3, 2, 2, 2, 3, 2, 3, 3, 3, 3, 2, 3, 2, 3, 3, 3, 3, 3, 3, 3, 2, 3, 3, 2, 3, 3, 2, 3, 3, 2, 3, 2, 3, 2, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) = A020639(A050278(n)); 2 <= a(n) <= 3.

a(n) is 2 1653120 times and 3 1612800 times, making the average value 202/81 = 2.493.... [Charles R Greathouse IV, Sep 09 2011]

LINKS

Table of n, a(n) for n=1..100.

FORMULA

a(n) = 2 + A000035(A050278(n)).

EXAMPLE

A050278(1)=1023456789=3*3*3*3*2221*5689 --> a(1)=3;

A050278(10)=1023457896=2*2*2*3*3*3*59*80309 --> a(10)=2;

A050278(100)=1023495786=2*3*3*739*76943 --> a(100)=2;

A050278(1000)=1024658793=3*3*113850977 --> a(1000)=3.

CROSSREFS

Sequence in context: A275821 A265157 A054263 * A124874 A230258 A016459

Adjacent sequences:  A178772 A178773 A178774 * A178776 A178777 A178778

KEYWORD

fini,nonn,base

AUTHOR

Reinhard Zumkeller, Jun 11 2010

EXTENSIONS

Edited by Charles R Greathouse IV, Aug 02 2010

STATUS

approved

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Last modified July 27 04:53 EDT 2017. Contains 289841 sequences.