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Search: id:A124413
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| A124413 |
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Numbers n such that 2n+1, 4n+1, 8n+1, 16n+1 and 32n+1 are primes. |
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+0
2
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| 765, 3420, 7695, 8325, 16650, 22185, 28995, 33300, 41715, 52935, 72510, 75075, 82950, 99810, 104715, 106425, 115620, 121275, 145635, 159840, 165900, 173070, 188745, 190815, 192795, 222870, 225705, 239400, 240510, 253395, 253890, 256410
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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Select[15*Range[20000], And @@ PrimeQ /@ ({2, 4, 8, 16, 32}*# + 1) &] (*Chandler*)
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CROSSREFS
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Cf. A005097, A123998, A124041, A124412-A124417.
Sequence in context: A139674 A124412 A158126 this_sequence A127206 A125109 A159209
Adjacent sequences: A124410 A124411 A124412 this_sequence A124414 A124415 A124416
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Nov 02 2006
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