OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
FORMULA
a(n) = A186302(n)+1.
MATHEMATICA
(#+1)/2&/@Select[8*Range[0, 300]+7, PrimeQ] (* Harvey P. Dale, Jul 14 2011 *)
PROG
(PARI) is(n)=n%4==0&&isprime(2*n-1) \\ Charles R Greathouse IV, Jan 22 2013
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Marco Matosic, Feb 17 2011
STATUS
approved