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A154496 a(n+1)-+a(n)=prime, a(n+1)*a(n)=Average of twin prime pairs, a(1)=3,a(2)=10. 5

%I #4 Jun 19 2021 12:52:27

%S 3,10,27,74,3093,3104,3417,3580,3597,3614,5907,5960,6651,6962,9045,

%T 9098,10479,10708,13299,13382,14055,14438,15099,16082,16101,16112,

%U 16521,16982,17505,19328,19605,20062,22131,22840,23013,23036,23265,23422

%N a(n+1)-+a(n)=prime, a(n+1)*a(n)=Average of twin prime pairs, a(1)=3,a(2)=10.

%C Sum and difference of any of two consecutive numbers in current sequence are prime numbers and multiplication and any two consecutive numbers is Average of twin prime pairs : 10-3=7;10+3=13;10*3=30, ...

%t a=3;b=10;lst={a,b};Do[If[PrimeQ[n-b]&&PrimeQ[n+b]&&PrimeQ[n*b-1]&&PrimeQ[n*b+1],AppendTo[lst,n];a=b;b=n],{n,b+1,9!}];lst

%Y Cf. A154484, A154485, A154486, A154487, A154488, A154493, A154494, A154495

%K nonn

%O 1,1

%A _Vladimir Joseph Stephan Orlovsky_, Jan 10 2009

%E NAME adapted to offset. - _R. J. Mathar_, Jun 19 2021

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Last modified September 13 22:05 EDT 2024. Contains 375910 sequences. (Running on oeis4.)