A348849 - cp's OEIS frontend

A348849 Number of fixed polyominoes with n cells that have fourfold rotational symmetry centered at the center of a cell.

n	a(n)
1	1
2	0
3	0
4	0
5	1
6	0
7	0
8	1
9	2
10	0
11	0
12	3
13	6
14	0
15	0
16	10
17	18
18	0
19	0
20	35
21	57
22	0
23	0
24	126
25	191
26	0
27	0
28	461
29	658
30	0
31	0
32	1699
33	2308
34	0
35	0
36	6315
37	8241
38	0
39	0
40	23686
41	29853
42	0
43	0
44	89432
45	109268
46	0
47	0
48	339473
49	403450
50	0
51	0
52	1294826
53	1501074

[1, 0, 0, 0, 1, 0, 0, 1, 2, 0, 0, 3, 6, 0, 0, 10, 18, 0, 0, 35, 57, 0, 0, 126, 191, 0, 0, 461, 658, 0, 0, 1699, 2308, 0, 0, 6315, 8241, 0, 0, 23686, 29853, 0, 0, 89432, 109268, 0, 0, 339473, 403450, 0, 0, 1294826, 1501074]

cp's OEIS Frontend

A348849 Number of fixed polyominoes with n cells that have fourfold rotational symmetry centered at the center of a cell.

Table of values

List of values