A357648 Number of polyominoes with n cells that have the symmetry group D_8 and are without holes.
1, 0, 0, 1, 1, 0, 0, 0, 2, 0, 0, 1, 2, 0, 0, 1, 3, 0, 0, 1, 5, 0, 0, 2, 8, 0, 0, 2, 13, 0, 0, 3, 20, 0, 0, 5, 33, 0, 0, 6, 55, 0, 0, 10, 93, 0, 0, 13, 157, 0, 0, 22, 268, 0, 0, 30, 461, 0, 0, 51, 801, 0, 0, 71, 1396, 0, 0, 124, 2459, 0, 0, 175, 4329, 0, 0, 317, 7696
Offset: 1