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!)
A124659 Twin prime products minus 2. 1

%I #6 Nov 11 2020 12:25:27

%S 13,33,141,321,897,1761,3597,5181,10401,11661,19041,22497,32397,36861,

%T 39201,51981,57597,72897,79521,97341,121101,176397,186621,213441,

%U 272481,324897,359997,381921,412161,435597,656097,675681,685581,736161,777921

%N Twin prime products minus 2.

%H Harvey P. Dale, <a href="/A124659/b124659.txt">Table of n, a(n) for n = 1..1000</a>

%t Times@@#-2&/@Select[Partition[Prime[Range[200]],2,1],#[[2]]-#[[1]]==2&] (* _Harvey P. Dale_, Nov 11 2020 *)

%o (PARI) g(n) = forprime(x=1,n,if(isprime(x+2),y=x*(x+2)-2;print1(y",")))

%K easy,nonn

%O 1,1

%A _Cino Hilliard_, Dec 27 2006

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 April 25 16:45 EDT 2024. Contains 371989 sequences. (Running on oeis4.)