204180domain: NAppears in sequencesSum of divisors of n and product of divisors of n are both perfect cubes.at n=29A244428n/3 analog of Keith numbers.at n=14A282767Triangle read by rows: T(n,k) is the coefficient of x^k in the ZZ polynomial of the hexagonal graphene flake O(3,3,n).at n=38A338158