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A157341 Least number k such that 6*k^n-1 is prime 0
1, 2, 2, 10, 2, 2, 3, 20, 22, 2, 3, 220, 9, 8, 30, 120, 2, 7, 3, 45, 4, 3, 10, 125, 8, 3, 4, 5, 77, 108, 8, 30, 2, 3, 35, 15, 2, 35, 53, 10, 32, 2, 32, 50, 37, 12, 17, 215, 73, 45, 4, 55, 43, 2, 3, 715, 42, 70, 33, 160, 3, 90, 2, 745, 5, 38, 3, 40, 7, 295, 4, 5, 10, 70, 2, 90, 138, 32, 60 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..79.

CROSSREFS

Sequence in context: A081086 A019514 A135816 * A038036 A297793 A319880

Adjacent sequences:  A157338 A157339 A157340 * A157342 A157343 A157344

KEYWORD

nonn

AUTHOR

Pierre CAMI, Feb 27 2009

EXTENSIONS

Corrected by Pierre CAMI, Mar 09 2009

STATUS

approved

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Last modified March 24 19:48 EDT 2019. Contains 321448 sequences. (Running on oeis4.)