Search: id:A139220
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%I A139220
%S A139220 0,3,11,20,23,27,32,39,44,48,51,56,59,60,83,104,108,111,116,128,132,135,
%T A139220 143,171,188,203,207,212,227,240,251,263,275,296,300,312,315,324,356,
%U A139220 359,363,380,384,392,399,408,443,447,476,479,483,504,507,515,527,528
%N A139220 Numbers n such that 41+(n+n^2)/2 = 41+A000217(n) is prime.
%C A139220 Corresponding values of primes in A139219.
%C A139220 Numbers n, such that both 41+(n+n^2)/2 and 41+(n+n^2)
%C A139220 are primes, in A139221.
%t A139220 Select[Table[Range[0,1000]],PrimeQ[41+(#+#^2)/2]&]
%Y A139220 Cf. A000217, A056561, A139219, A139221.
%Y A139220 Sequence in context: A028978 A082628 A166096 this_sequence A139221 A006876 
               A031239
%Y A139220 Adjacent sequences: A139217 A139218 A139219 this_sequence A139221 A139222 
               A139223
%K A139220 nonn
%O A139220 0,2
%A A139220 Zak Seidov (zakseidov(AT)yahoo.com), Apr 11 2008

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