login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A168537 The lesser of twin primes p of the form p*q+a+b+c, (p and q are twin primes, p+2=q, a=p-1, b=(p+q)/2, c=q+1). 0

%I #2 Mar 31 2012 12:38:27

%S 179,10709,32939,122147,326609,1105649,1516589,1699109,2218607,

%T 2787227,12670037,17052767,37106369,45744929,74468267,81784889,

%U 101394827,142599419,150148259,205162649,377272349,668196647,816444899,853194887

%N The lesser of twin primes p of the form p*q+a+b+c, (p and q are twin primes, p+2=q, a=p-1, b=(p+q)/2, c=q+1).

%e 11*13+10+12+14=179,..

%t lst={};Do[p=Prime[n];q=p+2;If[PrimeQ[q],a=p-1;b=p+1;c=q+1;If[PrimeQ[x=p*q+a+b+c]&&PrimeQ[p*q+a+b+c+2],AppendTo[lst,x]]],{n,8!}];lst

%Y Cf. A168536

%K nonn

%O 1,1

%A _Vladimir Joseph Stephan Orlovsky_, Nov 28 2009

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 29 06:18 EST 2024. Contains 370401 sequences. (Running on oeis4.)