A328534 G.f. = Phi^3*F^3, where Phi = g.f. for A028930, F = g.f. for A028959.
1, 6, 18, 50, 132, 276, 530, 1008, 1710, 2760, 4464, 6828, 10268, 15246, 21828, 30820, 42750, 57696, 77032, 101916, 132564, 169736, 216816, 269286, 338490, 412386, 507354, 605278, 739308, 865314, 1042944, 1207962, 1437132, 1643508, 1943628, 2191176
Offset: 0