66679200domain: NAppears in sequencesDenominators of the central moments of the distribution of areas for triangles picked at random in a triangle of unit area.at n=5A130118Coreful 4-abundant numbers: numbers k such that csigma(k) > 4*k, where csigma(k) is the sum of the coreful divisors of k (A057723).at n=21A340110