OFFSET
1,1
COMMENTS
Each p is an odd number, so p^2 == 1 (mod 8), thus (p^2 + 9)/2 == 1 (mod 4).
EXAMPLE
17 is in the sequence as 17 = (p^2 + 9)/2 where p = 5 is prime.
29 is in the sequence as 29 = (p^2 + 9)/2 where p = 7 is prime.
MATHEMATICA
Select[(Select[Range[3, 1000], PrimeQ]^2 + 9)/2, PrimeQ] (* Amiram Eldar, Sep 05 2021 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Burak Muslu, Sep 05 2021
STATUS
approved