A357647 - cp's OEIS frontend

A357647 a(n) is the number of free unholey polyominoes of n cells with 90-degree rotational symmetry and no other.

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	2
13	2
14	0
15	0
16	7
17	7
18	0
19	0
20	22
21	24
22	0
23	0
24	71
25	82
26	0
27	0
28	239
29	280
30	0
31	0
32	817
33	970
34	0
35	0
36	2841
37	3403
38	0
39	0
40	10027
41	12064
42	0
43	0
44	35800
45	43193
46	0
47	0
48	129007
49	156011
50	0
51	0
52	468541
53	567664
54	0
55	0
56	1713174

[0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 2, 2, 0, 0, 7, 7, 0, 0, 22, 24, 0, 0, 71, 82, 0, 0, 239, 280, 0, 0, 817, 970, 0, 0, 2841, 3403, 0, 0, 10027, 12064, 0, 0, 35800, 43193, 0, 0, 129007, 156011, 0, 0, 468541, 567664, 0, 0, 1713174]

cp's OEIS Frontend

A357647 a(n) is the number of free unholey polyominoes of n cells with 90-degree rotational symmetry and no other.

Table of values

List of values