A284871 - cp's OEIS frontend

A284871 Array read by antidiagonals: T(n,k) = number of primitive (aperiodic) reversible strings of length n using a maximum of k different symbols.

n	a(n)
1	1
2	2
3	0
4	3
5	1
6	0
7	4
8	3
9	4
10	0
11	5
12	6
13	15
14	7
15	0
16	6
17	10
18	36
19	39
20	18
21	0
22	7
23	15
24	70
25	126
26	132
27	29
28	0
29	8
30	21
31	120
32	310
33	540
34	357
35	70
36	0
37	9
38	28
39	189
40	645
41	1620
42	2034
43	1131
44	126
45	0
46	10
47	36
48	280
49	1197
50	3990
51	7790
52	8316
53	3276
54	266
55	0

[1, 2, 0, 3, 1, 0, 4, 3, 4, 0, 5, 6, 15, 7, 0, 6, 10, 36, 39, 18, 0, 7, 15, 70, 126, 132, 29, 0, 8, 21, 120, 310, 540, 357, 70, 0, 9, 28, 189, 645, 1620, 2034, 1131, 126, 0, 10, 36, 280, 1197, 3990, 7790, 8316, 3276, 266, 0]

cp's OEIS Frontend

A284871 Array read by antidiagonals: T(n,k) = number of primitive (aperiodic) reversible strings of length n using a maximum of k different symbols.

Table of values

List of values