A378014 - cp's OEIS frontend

A378014 Triangle read by rows: T(n,k) = number of free hexagonal polyominoes with n cells, where the maximum number of cells on any lattice line is k. The term "lattice line" here means a line running through the cell centers and midpoints of their sides.

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	3
13	15
14	3
15	1
16	0
17	5
18	50
19	23
20	3
21	1
22	0
23	1
24	171
25	126
26	30
27	4
28	1
29	0
30	1
31	506
32	710
33	187
34	39
35	4
36	1
37	0
38	1
39	1459
40	3520
41	1268
42	270
43	48
44	5
45	1
46	0
47	1
48	3792
49	16617
50	7703
51	1948
52	364
53	59
54	5
55	1
56	0
57	1
58	9292
59	72870
60	45099
61	12885
62	2840
63	488
64	70
65	6
66	1

[1, 0, 1, 0, 2, 1, 0, 4, 2, 1, 0, 3, 15, 3, 1, 0, 5, 50, 23, 3, 1, 0, 1, 171, 126, 30, 4, 1, 0, 1, 506, 710, 187, 39, 4, 1, 0, 1, 1459, 3520, 1268, 270, 48, 5, 1, 0, 1, 3792, 16617, 7703, 1948, 364, 59, 5, 1, 0, 1, 9292, 72870, 45099, 12885, 2840, 488, 70, 6, 1]

cp's OEIS Frontend

A378014 Triangle read by rows: T(n,k) = number of free hexagonal polyominoes with n cells, where the maximum number of cells on any lattice line is k. The term "lattice line" here means a line running through the cell centers and midpoints of their sides.

Table of values

List of values