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!)
A089953 Numbers n such that 3*n+7 is prime. 4

%I #14 Jan 21 2020 19:45:54

%S 0,2,4,8,10,12,18,20,22,24,30,32,34,40,44,48,50,52,58,62,64,68,72,74,

%T 78,88,90,92,100,102,108,110,114,120,122,124,130,134,138,142,144,150,

%U 152,160,164,172,178,180,188,190,198,200,202,204,208,212,218,222,228

%N Numbers n such that 3*n+7 is prime.

%D M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988.

%D Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta,UTET, CittaStudiEdizioni, Milano 1997.

%H Daniel Starodubtsev, <a href="/A089953/b089953.txt">Table of n, a(n) for n = 1..10000</a>

%F a(n) = A034936(n)-1 = A024892(n)-2 = 2*A024899(n)-2.

%o (PARI) is(n)=isprime(3*n+7) \\ _Charles R Greathouse IV_, May 22 2017

%Y Cf. A002476 gives primes, A034936, A024892, A024899.

%K nonn

%O 1,2

%A _Giovanni Teofilatto_, Jan 12 2004

%E Offset corrected by _Arkadiusz Wesolowski_, Aug 09 2011

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 March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)