Search: id:A124415
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%I A124415
%S A124415 8325,82950,884220,1120470,3441690,5627895,5765505,7664745,7757430,
%T A124415 8555040,10739505,11891625,15514860,15623475,18268455,22631970,24833775,
%U A124415 27373410,29342895,31286970,31577205,50077455,51541035,58646520
%N A124415 Numbers n such that 2n+1, 4n+1, 8n+1, 16n+1, 32n+1, 64n+1 and 128n+1 
               are primes.
%t A124415 Select[15*Range[4000000], And @@ PrimeQ /@ ({2, 4, 8, 16, 32, 64, 128}*# 
               + 1) &] (*Chandler*)
%Y A124415 Cf. A005097, A123998, A124041, A124412-A124417.
%Y A124415 Sequence in context: A031769 A062852 A124414 this_sequence A031947 A049357 
               A069402
%Y A124415 Adjacent sequences: A124412 A124413 A124414 this_sequence A124416 A124417 
               A124418
%K A124415 nonn
%O A124415 1,1
%A A124415 Artur Jasinski (grafix(AT)csl.pl), Nov 02 2006
%E A124415 Corrected and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), 
               Nov 21 2006

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