OFFSET
1,2
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..3000
EXAMPLE
a(1)=1 because 4*prime(1)-3=5=prime and 4*prime(1)+3=11=prime; a(2)=3 because 4*prime(3)-3=17=prime and 4*prime(3)+3=23=prime.
MATHEMATICA
Select[Range[800], And@@PrimeQ[4 Prime[#]+{3, -3}]&] (* Harvey P. Dale, Dec 09 2012 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Juri-Stepan Gerasimov, Mar 05 2010
EXTENSIONS
Corrected (24 inserted, 104 replaced by 105, 114 removed etc.) by R. J. Mathar, Apr 28 2010
STATUS
approved