A378015 - cp's OEIS frontend

A378015 Triangle read by rows: T(n,k) = number of free hexagonal polyominoes with n cells, where the maximum number of collinear cell centers on any line in the plane is k.

n	a(n)
1	1
2	0
3	1
4	0
5	2
6	1
7	0
8	4
9	2
10	1
11	0
12	2
13	16
14	3
15	1
16	0
17	3
18	52
19	23
20	3
21	1
22	0
23	0
24	169
25	129
26	30
27	4
28	1
29	0
30	0
31	477
32	740
33	187
34	39
35	4
36	1
37	0
38	0
39	1245
40	3729
41	1274
42	270
43	48
44	5
45	1
46	0
47	0
48	2750
49	17578
50	7785
51	1948
52	364
53	59
54	5
55	1
56	0
57	0
58	5380
59	75827
60	46045
61	12895
62	2840
63	488
64	70
65	6
66	1

[1, 0, 1, 0, 2, 1, 0, 4, 2, 1, 0, 2, 16, 3, 1, 0, 3, 52, 23, 3, 1, 0, 0, 169, 129, 30, 4, 1, 0, 0, 477, 740, 187, 39, 4, 1, 0, 0, 1245, 3729, 1274, 270, 48, 5, 1, 0, 0, 2750, 17578, 7785, 1948, 364, 59, 5, 1, 0, 0, 5380, 75827, 46045, 12895, 2840, 488, 70, 6, 1]

cp's OEIS Frontend

A378015 Triangle read by rows: T(n,k) = number of free hexagonal polyominoes with n cells, where the maximum number of collinear cell centers on any line in the plane is k.

Table of values

List of values