Search: id:A090106
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%I A090106
%S A090106 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,
%T A090106 27,52,61,219
%N A090106 Values of n such that P[n]=n^2+n+41 is prime and also {P[n+1],...,P[n+13-1]} 
               are prime numbers. Namely: a(n)= the first argument providing 13 
               "polynomially consecutive" primes with respect of polynomial=x^2+x+41.
%e A090106 a(n)=219: {P[219],..,P[231]}={48221,...,53633}, i.e. 13 consecutive integer 
               values substituted to P[x]=x^2+x+41 polynomial, all provide primes; 
               the "classical case" include one single 41-chain of PC-primes, see 
               A055561.
%t A090106 po[x_] := x^2+x+41 Do[s=po[n];s0=po[n];s1=po[n+1]; s2=po[n+2];s3=po[n+3];
               s4=po[ +4];s5=po[n+5]; s6=po[n+6];s7=po[n+7];s8=po[n+8];s9=po[n+9]; 
               s10=po[n+10];s11=po[n+11];s12=po[n+12]; If[IntegerQ[n/100000], Print[{n}]]; 
               If[PrimeQ[s0]&&PrimeQ[s1]&&PrimeQ[s2]&&PrimeQ[s3] &&PrimeQ[s4]&&PrimeQ[s5]&&PrimeQ[s6]&&PrimeQ[s7]&&Prime\
               Q[s8]&& PrimeQ[s9]&&PrimeQ[s10]&&PrimeQ[s11]&&PrimeQ[s12], Print[{n, 
               s0, s1, s11, s12}]], {n, 1, 600000}]
%Y A090106 Cf. A055561, A090562, A090563, A090101, A090102.
%Y A090106 Sequence in context: A080683 A124231 A154470 this_sequence A167662 A135383 
               A032521
%Y A090106 Adjacent sequences: A090103 A090104 A090105 this_sequence A090107 A090108 
               A090109
%K A090106 nonn
%O A090106 1,2
%A A090106 Labos E. (labos(AT)ana.sote.hu), Dec 22 2003

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