5272635domain: NAppears in sequencesNumbers m with odd length such that sigma(m) = d_1*(d_2^d_3) *...*(d_(k-1)^d_k) where d_1 d_2 ... d_k is the decimal expansion of m.at n=4A112016Odd numbers n such that A196189(n) is odd.at n=15A196190