The first 10 terms of the sequence of dimensions of

the space of polynomials of degree<=d, annihilated by the differential opera\
    tors

                       2     2               3     3     3
                     D1  + D2  + D3, and , D1  + D2  + D3

       where D1, D2, D3 are differentiations w.r.t. to x,y,z resp., are:

                       [1, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3]

                          This took , 0.464, seconds