A284826 - cp's OEIS frontend

A284826 Irregular triangle T(n,k) for 1 <= k <= (n+1)/2: T(n,k) = number of primitive (aperiodic) palindromic structures of length n using exactly k different symbols.

n	a(n)
1	1
2	0
3	0
4	1
5	0
6	1
7	0
8	3
9	1
10	0
11	2
12	1
13	0
14	7
15	6
16	1
17	0
18	6
19	6
20	1
21	0
22	14
23	25
24	10
25	1
26	0
27	12
28	24
29	10
30	1
31	0
32	31
33	90
34	65
35	15
36	1
37	0
38	27
39	89
40	65
41	15
42	1
43	0
44	63
45	301
46	350
47	140
48	21
49	1
50	0
51	56
52	295
53	349
54	140
55	21
56	1
57	0
58	123
59	965
60	1701
61	1050
62	266
63	28
64	1

[1, 0, 0, 1, 0, 1, 0, 3, 1, 0, 2, 1, 0, 7, 6, 1, 0, 6, 6, 1, 0, 14, 25, 10, 1, 0, 12, 24, 10, 1, 0, 31, 90, 65, 15, 1, 0, 27, 89, 65, 15, 1, 0, 63, 301, 350, 140, 21, 1, 0, 56, 295, 349, 140, 21, 1, 0, 123, 965, 1701, 1050, 266, 28, 1]

cp's OEIS Frontend

A284826 Irregular triangle T(n,k) for 1 <= k <= (n+1)/2: T(n,k) = number of primitive (aperiodic) palindromic structures of length n using exactly k different symbols.

Table of values

List of values