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A122691 a(n)=least prime factor of (9*10^m-11)/7, m=6n-4. 0
127, 401, 19, 53, 151, 7, 139, 127, 19, 78721, 3458771, 19, 7, 38954263, 19, 79, 53, 19, 157, 7, 19, 127, 18191, 19, 12119, 421, 7, 127, 401, 19, 53, 151, 7, 139, 127, 19, 78721, 3458771, 19, 7, 38954263, 19, 79, 53, 19, 157, 7, 19, 127, 18191, 19, 12119, 421, 7 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
n=2, m=8, (9*10^m-11)/7 = 128571427=401*320627 hence a(2)=401
CROSSREFS
Sequence in context: A095312 A143034 A159521 * A082251 A142384 A298237
KEYWORD
nonn
AUTHOR
Zak Seidov, Sep 22 2006
STATUS
approved

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Last modified May 21 04:06 EDT 2024. Contains 372720 sequences. (Running on oeis4.)