3066336domain: NAppears in sequencesNumbers k such that sigma(tau(k)) = rad(k).at n=21A173582If n=0 then 1 otherwise 48*(1+12*A318935(n))*(sum of cubes of odd divisors of n).at n=17A318939Expansion of e.g.f. 1/(1 - log(1 - x)^4).at n=9A353119