2539515domain: NAppears in sequencesa(n) = Sum_{j=1..n} Sum_{i=1..j} j^3*i^3.at n=9A346642Numbers m for which the sum of all values of k satisfying the equation: (m - floor((m - k)/k)) mod k = 0 (1 <= k <= m) equals 2*m.at n=12A380153