A327878 - cp's OEIS frontend

A327878 Irregular triangle read by rows: T(n,k) is the number of primitive (period n) periodic palindromes using exactly k different symbols, 1 <= k <= 1 + floor(n/2).

n	a(n)
1	1
2	0
3	1
4	0
5	2
6	0
7	3
8	3
9	0
10	6
11	6
12	0
13	7
14	21
15	12
16	0
17	14
18	36
19	24
20	0
21	18
22	90
23	132
24	60
25	0
26	28
27	150
28	240
29	120
30	0
31	39
32	339
33	900
34	960
35	360
36	0
37	62
38	540
39	1560
40	1800
41	720
42	0
43	81
44	1149
45	4968
46	9300
47	7920
48	2520
49	0
50	126
51	1806
52	8400
53	16800
54	15120
55	5040
56	0
57	175
58	3765
59	24588
60	71400
61	103320
62	73080
63	20160

[1, 0, 1, 0, 2, 0, 3, 3, 0, 6, 6, 0, 7, 21, 12, 0, 14, 36, 24, 0, 18, 90, 132, 60, 0, 28, 150, 240, 120, 0, 39, 339, 900, 960, 360, 0, 62, 540, 1560, 1800, 720, 0, 81, 1149, 4968, 9300, 7920, 2520, 0, 126, 1806, 8400, 16800, 15120, 5040, 0, 175, 3765, 24588, 71400, 103320, 73080, 20160]

cp's OEIS Frontend

A327878 Irregular triangle read by rows: T(n,k) is the number of primitive (period n) periodic palindromes using exactly k different symbols, 1 <= k <= 1 + floor(n/2).

Table of values

List of values