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A124416
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Numbers n such that 2n+1, 4n+1, 8n+1, 16n+1, 32n+1, 64n+1, 128n+1 and 256n+1 are primes.
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1
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7757430, 31286970, 360821505, 365536215, 414779430, 418803000, 428547690, 428823900, 434768475, 508654155, 584808795, 732681630, 809814510, 846079035, 857095380, 968314215, 1115279880, 1187901285, 1193371860, 1244805450
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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MATHEMATICA
| Select[15*Range[10^8], And @@ PrimeQ /@ ({2, 4, 8, 16, 32, 64, 128, 256}*# + 1) &] (*Chandler*)
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CROSSREFS
| Cf. A005097, A123998, A124041, A124412-A124417.
Sequence in context: A187962 A080340 A192105 * A205657 A206186 A205368
Adjacent sequences: A124413 A124414 A124415 * A124417 A124418 A124419
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KEYWORD
| nonn
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AUTHOR
| Artur Jasinski (grafix(AT)csl.pl), Nov 02 2006
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EXTENSIONS
| Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 21 2006
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