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

1,1

Links

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

Mathematica

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

Crossrefs

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

Sequence in context: A258676 A170778 A062852 * A124415 A233954 A224465

Adjacent sequences: A124411 A124412 A124413 * A124415 A124416 A124417

Keyword

nonn

Author

Artur Jasinski, Nov 02 2006

Status

approved