OFFSET
1,1
REFERENCES
M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988
Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta, UTET, CittaStudiEdizioni, Milano 1997
LINKS
Shawn A. Broyles, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Range[3, 200], PrimeQ[2#-7]&] (* Harvey P. Dale, Aug 24 2014 *)
PROG
(PARI) is(n)=isprime(2*n - 7) \\ Charles R Greathouse IV, Apr 28 2015
CROSSREFS
Numbers n such that 2n+k is prime: A005097 (k=1), A067076 (k=3), A089038 (k=5), A105760 (k=7), A155722 (k=9), A101448 (k=11), A153081 (k=13), A089559 (k=15), A173059 (k=17), A153143 (k=19).
KEYWORD
easy,nonn
AUTHOR
Giovanni Teofilatto, Dec 08 2003
EXTENSIONS
Corrected by Ralf Stephan, Mar 03 2004
Further correction from Jeremy Gardiner, Sep 11 2004
STATUS
approved