A349328 - cp's OEIS frontend

A349328 Number of polyominoes with n cells and exactly one line of reflection symmetry, where that one line is parallel to the grid and passes through the center of at least one square.

n	a(n)
1	0
2	0
3	0
4	1
5	2
6	4
7	9
8	16
9	38
10	62
11	147
12	241
13	564
14	926
15	2148
16	3561
17	8195
18	13700
19	31349
20	52858
21	120357
22	204444
23	463712
24	792986
25	1792582
26	3083469
27	6950579
28	12018394
29	27023509
30	46943409
31	105320716
32	183715445
33	411364068
34	720236762
35	1609836928
36	2828102115

[0, 0, 0, 1, 2, 4, 9, 16, 38, 62, 147, 241, 564, 926, 2148, 3561, 8195, 13700, 31349, 52858, 120357, 204444, 463712, 792986, 1792582, 3083469, 6950579, 12018394, 27023509, 46943409, 105320716, 183715445, 411364068, 720236762, 1609836928, 2828102115]

cp's OEIS Frontend

A349328 Number of polyominoes with n cells and exactly one line of reflection symmetry, where that one line is parallel to the grid and passes through the center of at least one square.

Table of values

List of values