OFFSET
1,1
COMMENTS
A242330 gives the corresponding values of k.
FORMULA
a(n) = A242330(n)^2 + 2.
EXAMPLE
123 is a term because 11^2 + 2 = 123 = 3*41.
MATHEMATICA
Select[Range[0, 200]^2 + 2, PrimeOmega[#] == 2 &] (* Amiram Eldar, Feb 18 2023 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Elmo R. Oliveira, Feb 18 2023
STATUS
approved