119680domain: NAppears in sequencesa(n) = n*(27*n^3 + 22*n^2 - 21*n - 16)/12.at n=15A172085Numbers k such that k = Product (p_j^e_j) = Product (p_j*(e_j + 1)).at n=42A304410Where the number of divisors d(k) reaches a new record for numbers k whose prime factors are of the form 3*j+2.at n=24A326312