A366020 Number of polyominoes in which every cell has coprime coordinates.
1, 1, 2, 3, 8, 13, 36, 76, 201, 476, 1218, 2952, 7282, 17566, 42657, 102931, 249119
Offset: 1
Examples
For n = 9, the only polyomino from A294151 which does not belong to this sequence is the following, because it has always one cell whose coordinates are both divisible by 3 :
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