A085872 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, 3, 7, 13, 53, 211, 2111, 8443, 33773, 202637, 1621097, 16210969, 453907133, 8170328393, 196087881433, 1176527288597, 7059163731583, 254129894336987, 6099117464087689, 158577054066279913, 8246006811446555477

Offset

1,1

Links

Table of n, a(n) for n=1..21.

Crossrefs

Cf. A085871.

Sequence in context: A273814 A371131 A361988 * A070858 A061067 A171434

Adjacent sequences: A085869 A085870 A085871 * A085873 A085874 A085875

Keyword

nonn

Author

Amarnath Murthy, Jul 07 2003

Extensions

More terms from Ray Chandler, Jul 08 2003

Status

approved