A093442 a(n) = (A093441(n+1)-1)/(A093441(n)-1).

3, 5, 7, 11, 19, 29, 13, 59, 37, 31, 47, 67, 53, 41, 97, 73, 113, 103, 43, 71, 233, 61, 151, 109, 101, 251, 107, 587, 79, 223, 167, 311, 239, 137, 139, 359, 181, 257, 337, 163, 173, 881, 563, 149, 409, 157, 179, 293, 127, 331, 191, 269, 317, 83, 277, 23, 821, 373, 271

Offset: 1

Author

Amarnath Murthy, Apr 01 2004

Keywords

• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..500

Crossrefs

Cf. A093441.

Cf. A083771. - R. J. Mathar, Sep 05 2008

Programs

Mathematica

a[1] = 3; a[n_] := a[n] = Block[{k = m = a[n - 1] - 1}, k *= 2; While[ ! PrimeQ[k + 1] || ! SquareFreeQ[k], k += m]; k + 1]; Table[(a[n + 1] - 1)/(a[n] - 1), {n, 60}] (* Stefan Steinerberger, Apr 03 2006 *)

Extensions

More terms from Stefan Steinerberger, Apr 03 2006