A085882 a(1) = 2, a(n) = smallest prime of the form 2*k*prime(n)*a(n-1) + 1.

2, 13, 131, 5503, 121067, 75545809, 17979902543, 2049708889903, 3771464357421521, 1093724663652241091, 406865574878633685853, 2137671730412341385471663, 17879486353168823348084989333

Offset

1,1

Links

Table of n, a(n) for n=1..13.

Example

a(3) = 2*prime(3)*a(2) + 1 = 2*5*13 +1 = 131.

Crossrefs

Sequence in context: A215624 A247365 A107721 * A041509 A079165 A223075

Adjacent sequences: A085879 A085880 A085881 * A085883 A085884 A085885

Keyword

nonn

Author

Amarnath Murthy, Jul 08 2003

Extensions

More terms from Ray Chandler, Sep 13 2003

Status

approved