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A164325 a(n) is the smallest number m such that (2k-1)m+1 is prime for all 0<k<n+1. 1
1, 2, 2, 6, 1170, 64590, 25153800, 25153800, 4747505070, 207187349040, 6703860240000, 26997529639080 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..12.

CROSSREFS

Cf. A088250, A071576, A164326, A088251, A088651, A125838, A125839, A088252.

Sequence in context: A181265 A093909 A114362 * A198880 A201315 A199861

Adjacent sequences:  A164322 A164323 A164324 * A164326 A164327 A164328

KEYWORD

more,nonn

AUTHOR

Farideh Firoozbakht, Sep 15 2009

EXTENSIONS

a(5) corrected by Zak Seidov, Sep 16 2009

a(10) and a(11) from Zak Seidov, Sep 17 2009

a(12)=26997529639080 from Zak Seidov, Sep 25 2009

STATUS

approved

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Last modified March 29 06:34 EDT 2017. Contains 284250 sequences.