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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

Table of n, a(n) for n=1..23.

CROSSREFS

Sequence in context: A100238 A208529 A212660 * A009264 A048157 A130797

Adjacent sequences:  A098771 A098772 A098773 * A098775 A098776 A098777

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 April 17 11:26 EDT 2021. Contains 343064 sequences. (Running on oeis4.)