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A098774 Least k such that (k*Mersenne-prime(n))^2 + 1 is prime. 0
2, 2, 4, 12, 80, 34, 8, 12, 94, 96, 668, 198, 1170, 38, 700, 2402, 394, 7154, 4040, 1740, 4644, 8976, 12300 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
CROSSREFS
Sequence in context: A100238 A208529 A212660 * A009264 A048157 A130797
KEYWORD
more,nonn
AUTHOR
Pierre CAMI, Oct 03 2004
EXTENSIONS
More terms from Ray G. Opao, Dec 23 2004
12300 from Ryan Propper, Jan 02 2008
STATUS
approved

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Last modified February 24 14:43 EST 2024. Contains 370305 sequences. (Running on oeis4.)