OFFSET
1,1
COMMENTS
A242332 gives the corresponding values of k.
Except for 4, all terms == 5 (mod 8). - Robert Israel, Feb 18 2023
FORMULA
a(n) = A242332(n)^2 + 4.
EXAMPLE
85 is a term because 9^2 + 4 = 85 = 5*17.
MAPLE
select(t -> numtheory:-bigomega(t)=2, [seq(i^2+4, i=0..1000)]); # Robert Israel, Feb 18 2023
MATHEMATICA
Select[Range[0, 200]^2 + 4, PrimeOmega[#] == 2 &] (* Amiram Eldar, Feb 18 2023 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Elmo R. Oliveira, Feb 18 2023
STATUS
approved