A239572 - cp's OEIS frontend

A239572 Triangle T(n, k) = Numbers of non-equivalent (mod D_3) ways to place k points on a triangular grid of side n so that no two of them are adjacent. Triangle read by rows.

n	a(n)
1	1
2	1
3	2
4	2
5	1
6	3
7	6
8	6
9	1
10	4
11	16
12	32
13	24
14	7
15	1
16	5
17	32
18	113
19	200
20	176
21	66
22	6
23	7
24	60
25	329
26	1053
27	1976
28	2096
29	1162
30	302
31	34
32	2
33	8
34	100
35	790
36	3932
37	12565
38	25676
39	32963
40	25638
41	11294
42	2493
43	222
44	7
45	10
46	160
47	1702
48	11988
49	57275
50	187984
51	425329
52	658608
53	684671
54	462519

[1, 1, 2, 2, 1, 3, 6, 6, 1, 4, 16, 32, 24, 7, 1, 5, 32, 113, 200, 176, 66, 6, 7, 60, 329, 1053, 1976, 2096, 1162, 302, 34, 2, 8, 100, 790, 3932, 12565, 25676, 32963, 25638, 11294, 2493, 222, 7, 10, 160, 1702, 11988, 57275, 187984, 425329, 658608, 684671, 462519]

cp's OEIS Frontend

A239572 Triangle T(n, k) = Numbers of non-equivalent (mod D_3) ways to place k points on a triangular grid of side n so that no two of them are adjacent. Triangle read by rows.

Table of values

List of values