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A124412
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Numbers k such that 2*k+1, 4*k+1, 8*k+1 and 16*k+1 are primes.
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7
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765, 1065, 1155, 1530, 3105, 3420, 3705, 5160, 6840, 7695, 8325, 9060, 11265, 11505, 12195, 14835, 15390, 15885, 16650, 17655, 20745, 22185, 23205, 27300, 28155, 28995, 30165, 30690, 33300, 33825, 39015, 41715, 42690, 44370, 48465, 49935
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refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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Amiram Eldar, Table of n, a(n) for n = 1..10000
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MATHEMATICA
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Select[15*Range[3500], And @@ PrimeQ /@ ({2, 4, 8, 16}*# + 1) &] (* Ray Chandler, Nov 21 2006 *)
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CROSSREFS
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Cf. A005097, A123998, A124041, A124413-A124417.
Sequence in context: A156395 A188402 A139674 * A280972 A158126 A124413
Adjacent sequences: A124409 A124410 A124411 * A124413 A124414 A124415
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski, Nov 02 2006
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STATUS
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approved
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