162570240000domain: NAppears in sequencesThe first right hand column of triangle A162990.at n=8A162991a(n) is the least k > 0 such that A303809(k) = 2^n.at n=26A303819Numbers k with record values of the ratio d(k)/id(k) between the number of divisors and the number of infinitary divisors.at n=21A335832