A144553 - cp's OEIS frontend

A144553 Number of chiral pairs of polyominoes with n cells that have precisely the symmetry group of order 4 generated by 90-degree rotations.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	1
9	0
10	0
11	0
12	3
13	2
14	0
15	0
16	12
17	7
18	0
19	0
20	44
21	25
22	0
23	0
24	165
25	90
26	0
27	0
28	603
29	319
30	0
31	0
32	2235
33	1136
34	0
35	0
36	8283
37	4088
38	0
39	0
40	30936
41	14868
42	0
43	0
44	116111
45	54526
46	0
47	0
48	438465
49	201527
50	0
51	0
52	1663720
53	750169
54	0
55	0
56	6342211
57	2809931
58	0
59	0
60	24273767

[0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 3, 2, 0, 0, 12, 7, 0, 0, 44, 25, 0, 0, 165, 90, 0, 0, 603, 319, 0, 0, 2235, 1136, 0, 0, 8283, 4088, 0, 0, 30936, 14868, 0, 0, 116111, 54526, 0, 0, 438465, 201527, 0, 0, 1663720, 750169, 0, 0, 6342211, 2809931, 0, 0, 24273767]

cp's OEIS Frontend

A144553 Number of chiral pairs of polyominoes with n cells that have precisely the symmetry group of order 4 generated by 90-degree rotations.

Table of values

List of values