Search: id:A156782
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%I A156782
%S A156782 19,29,43,73,137,149,157,179,211,379,383,401,409,433,467,557,569,577,
%T A156782 599,677,839,863,883,919,997,1103,1303,1499,1553,1637,1669,1709,1783,
%U A156782 1811,1861,1873,1951,2113,2207,2309,2393,2503,2647,2663,2713,2791,3011
%N A156782 Primes : if sums of prime number and 4 consecutive prime numbers on-left-and-on-right 
               are also primes.
%C A156782 7+11+13+17+19=67(prime);19+23+29+31+37=139(prime),... prime(n)+prime(n-1)+prime(n-2)+prime(n-3)+prime(n-4) 
               are primes and prime(n)+prime(n+1)+prime(n+2)+prime(n+3)+prime(n+4) 
               are also primes.
%t A156782 lst={};Do[p0=Prime[n+0];p1=Prime[n+1];p2=Prime[n+2];p3=Prime[n+3];p4=Prime[n+4];
               p5=Prime[n+5];p6=Prime[n+6];p7=Prime[n+7];p8=Prime[n+8];If[PrimeQ[p0+p1+p2+p3+p4]&&PrimeQ[p4+p5+p6+p7+p8]\
               ,AppendTo[lst,p4]],{n,7!}];lst
%Y A156782 Cf. A156781
%Y A156782 Sequence in context: A100590 A046120 A063644 this_sequence A092600 A050266 
               A106124
%Y A156782 Adjacent sequences: A156779 A156780 A156781 this_sequence A156783 A156784 
               A156785
%K A156782 nonn
%O A156782 1,1
%A A156782 Vladimir Orlovsky (4vladimir(AT)gmail.com), Feb 15 2009

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