Search: id:A139221
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%I A139221
%S A139221 0,3,11,20,23,27,32,39,48,51,59,60,83,108,111,116,128,132,135,171,188,
%T A139221 203,212,227,240,263,275,315,324,356,359,363,384,392,447,476,479,515,
%U A139221 528,588,627,647,648,672,731,759,780,804,839,864,875,900,903,968,975
%N A139221 Numbers n such that both 41+(n+n^2)/2 and 41+(n+n^2) are primes.
%C A139221 Intersection of A139220 and A056561.
%t A139221 Select[Table[Range[0,2000]],PrimeQ[41+(#+#^2)/2]&&PrimeQ[41+#+#^2]&]
%Y A139221 Cf. A000217, A056561, A139219, A139220.
%Y A139221 Sequence in context: A082628 A166096 A139220 this_sequence A006876 A031239 
               A088619
%Y A139221 Adjacent sequences: A139218 A139219 A139220 this_sequence A139222 A139223 
               A139224
%K A139221 nonn
%O A139221 0,2
%A A139221 Zak Seidov (zakseidov(AT)yahoo.com), Apr 11 2008

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