OFFSET
1,1
COMMENTS
Prime terms in A121259 = numbers n such that (3n^2+1)/4 is prime.
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Prime[Range[200]], PrimeQ[(3#^2+1)/4]&] (* Harvey P. Dale, Apr 25 2017 *)
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Zak Seidov, Aug 25 2006
STATUS
approved