OFFSET
1,2
COMMENTS
MATHEMATICA
Select[Range[1, 250, 2], EvenQ[PrimeOmega[DivisorSigma[1, #^2]]] &] (* Amiram Eldar, Sep 19 2021 *)
PROG
(PARI) isA347886(n) = ((n%2)&&!(bigomega(sigma(n^2))%2));
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Sep 19 2021
STATUS
approved