A034719 Dirichlet convolution of powers of 3 (3,9,27,...) with themselves.

9, 54, 162, 567, 1458, 4860, 13122, 40824, 118827, 358668, 1062882, 3206142, 9565938, 28737180, 86106564, 258404985, 774840978, 2324916594, 6973568802, 20921808654, 62762237316, 188289546300, 564859072962, 1694587257216