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
Vincenzo Librandi, Table of n, a(n) for n = 1..10000
FORMULA
a(n) = A087915(n)+3.
MATHEMATICA
okQ[n_]:=Module[{x=2n-3}, PrimeQ[x]&&IntegerQ[(x-3)/4]]; Select[Range[1, 315, 2], okQ] (* Harvey P. Dale, Jan 12 2011 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Giovanni Teofilatto, Dec 17 2003
EXTENSIONS
Offset changed from 0 to 1 by Vincenzo Librandi, Dec 13 2011
STATUS
approved