A098774 Least k such that (k*Mersenne-prime(n))^2 + 1 is prime.

2, 2, 4, 12, 80, 34, 8, 12, 94, 96, 668, 198, 1170, 38, 700, 2402, 394, 7154, 4040, 1740, 4644, 8976, 12300

Offset

1,1

Links

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

Crossrefs

Sequence in context: A100238 A208529 A212660 * A009264 A375517 A048157

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