OFFSET
1,1
COMMENTS
These are all squares. Square roots are in A324909.
LINKS
FORMULA
a(n) = A324909(n)^2. - Amiram Eldar, Apr 05 2024
MATHEMATICA
Select[Range[1, 235, 2]^2, Mod[DivisorSigma[1, #], 4] == 3 &] (* Amiram Eldar, Apr 05 2024 *)
PROG
(PARI) isA324899(n) = ((n%2)&&3==(sigma(n)%4));
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Apr 20 2019
STATUS
approved