OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..10000
FORMULA
a(n) = A002145(n)^2.
a(n) ~ 4n^2 * (log n)^2. - Charles R Greathouse IV, Sep 20 2016
From Amiram Eldar, Dec 02 2022: (Start)
Product_{n>=1} (1 + 1/a(n)) = A243381.
Product_{n>=1} (1 - 1/a(n)) = A243379. (End)
MATHEMATICA
Select[4*Range[0, 100]+3, PrimeQ]^2 (* Harvey P. Dale, Sep 10 2012 *)
PROG
(PARI) p4np3(n)= forprime(x=3, n, if(x%4==3, y=x*x; print1(y, ", ")));
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Cino Hilliard, Sep 27 2003
EXTENSIONS
More terms from Ray Chandler, Oct 26 2003
STATUS
approved