A124414 Numbers k such that 2*k+1, 4*k+1, 8*k+1, 16*k+1, 32*k+1 and 64*k+1 are primes.

8325, 16650, 82950, 165900, 192795, 222870, 239400, 290235, 601560, 884220, 971685, 1020600, 1065570, 1120470, 1170330, 1196715, 1263360, 1638735, 1768440, 1811940, 1940190, 1948815, 2061810, 2207685, 2240940, 2639295, 2830905

Offset: 1

Author

Artur Jasinski, Nov 02 2006

Keywords

• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A005097, A123998, A124041, A124412-A124417.

Programs

Mathematica

Select[15*Range[200000], And @@ PrimeQ /@ ({2, 4, 8, 16, 32, 64}*# + 1) &] (* Ray Chandler, Nov 21 2006 *)