There is one polyomino with one block, one polyomino with two blocks, two polyominoes with three blocks, 5 polyominoes with 4 blocks, 12 polyominoes with 5 blocks, 35 polyominoes with 6 blocks, a whopping 108 polyominoes with 7 blocks, and a whopping 369 polyominoes with 8 blocks. That's so tiring!