A131487 - cp's OEIS frontend

A131487 a(n) is the number of polyominoes with n edges, including inner edges.

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	0
7	1
8	0
9	0
10	2
11	0
12	1
13	4
14	0
15	1
16	11
17	1
18	7
19	27
20	4
21	21
22	85
23	21
24	92
25	264
26	89
27	345
28	914
29	394
30	1405
31	3155
32	1736
33	5530
34	11400
35	7586
36	22022
37	41756
38	32702
39	87158
40	156412
41	139253
42	346836
43	592661
44	589101
45	1379837
46	2275935
47	2476770
48	5501846
49	8830267
50	10363627
51	21970992
52	34594887
53	43188260
54	87950618

[0, 0, 0, 1, 0, 0, 1, 0, 0, 2, 0, 1, 4, 0, 1, 11, 1, 7, 27, 4, 21, 85, 21, 92, 264, 89, 345, 914, 394, 1405, 3155, 1736, 5530, 11400, 7586, 22022, 41756, 32702, 87158, 156412, 139253, 346836, 592661, 589101, 1379837, 2275935, 2476770, 5501846, 8830267, 10363627, 21970992, 34594887, 43188260, 87950618]

cp's OEIS Frontend

A131487 a(n) is the number of polyominoes with n edges, including inner edges.

Table of values

List of values