References to A144554

Number of polyominoes with n cells whose symmetry group (excluding reflections) has order at least 2.
1, 1, 1, 3, 3, 7, 8, 25, 25, 82, 85, 302, 307, 1111, 1131, 4216, 4267, 16076, 16253

1 seqfan posts