OFFSET
1
COMMENTS
a(n) = 0 if n and A342925(n) have the same parity, otherwise 1.
LINKS
FORMULA
MATHEMATICA
ad[1] = 0; ad[n_] := n * Total@(Last[#]/First[#]& /@ FactorInteger[n]); a[n_] := Mod[n + ad[DivisorSigma[1, n]], 2]; Array[a, 105] (* Amiram Eldar, Sep 18 2021 *)
PROG
KEYWORD
nonn
AUTHOR
Antti Karttunen, Sep 17 2021
STATUS
approved