Polyare

A polyare is a polyform formed from a polyomino by removing of half of each square such that at least half of the original join between squares is retained.

The first few -ares are illustrated above for small . The following table gives the numbers of -ares and one-sided -ares for , 2, ..., 8.

	-ares	one-sided -ares
Sloane	A057724	A057725
1	1	1
2	3	4
3	9	16
4	42	77
5	180	351
6	889	1747
7	4392	8745
8	22432	44724