OFFSET
1,2
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
FORMULA
a(n) = sqrt((A201477(n)-4)/3). - Zak Seidov, Feb 04 2016
EXAMPLE
If m=77 then 3*m^2 + 4 = 17791 (prime).
MATHEMATICA
Select[Range[340], PrimeQ[3*#^2 + 4] &] (* Stefan Steinerberger, Feb 26 2006 *)
PROG
(PARI) lista(nn) = {for(n=1, nn, if(ispseudoprime(3*n^2 + 4), print1(n, ", "))); } \\ Altug Alkan, Feb 05 2016
(Magma) [n: n in [1..350] | IsPrime(3*n^2+4)]; // Vincenzo Librandi, Feb 06 2016
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Parthasarathy Nambi, Oct 06 2005
EXTENSIONS
More terms from Stefan Steinerberger, Feb 26 2006
STATUS
approved