A085871 a(1) = 2, a(2n) = smallest prime of the form k*a(2n-1) +1, k >1, a(2n+1) = smallest prime of the form r*a(2n)-1, r >1.

2, 5, 19, 191, 4201, 67217, 403301, 4839613, 38716903, 464602837, 27876170219, 55752340439, 4014168511607, 24085011069643, 578040265671431, 18497288501485793, 73989154005943171, 2663609544213954157

Offset

1,1

Links

Table of n, a(n) for n=1..18.

Crossrefs

Cf. A085872.

Sequence in context: A284860 A108799 A193674 * A202422 A212269 A359116

Adjacent sequences: A085868 A085869 A085870 * A085872 A085873 A085874

Keyword

nonn

Author

Amarnath Murthy, Jul 07 2003

Extensions

More terms from Ray Chandler, Jul 08 2003

Status

approved