A137651 - cp's OEIS frontend

A137651 Triangle read by rows: T(n,k) is the number of primitive (aperiodic) word structures of length n using exactly k different symbols.

n	a(n)
1	1
2	0
3	1
4	0
5	3
6	1
7	0
8	6
9	6
10	1
11	0
12	15
13	25
14	10
15	1
16	0
17	27
18	89
19	65
20	15
21	1
22	0
23	63
24	301
25	350
26	140
27	21
28	1
29	0
30	120
31	960
32	1700
33	1050
34	266
35	28
36	1
37	0
38	252
39	3024
40	7770
41	6951
42	2646
43	462
44	36
45	1
46	0
47	495
48	9305
49	34095
50	42524
51	22827
52	5880
53	750
54	45
55	1
56	0
57	1023
58	28501
59	145750
60	246730
61	179487
62	63987
63	11880
64	1155
65	55
66	1

[1, 0, 1, 0, 3, 1, 0, 6, 6, 1, 0, 15, 25, 10, 1, 0, 27, 89, 65, 15, 1, 0, 63, 301, 350, 140, 21, 1, 0, 120, 960, 1700, 1050, 266, 28, 1, 0, 252, 3024, 7770, 6951, 2646, 462, 36, 1, 0, 495, 9305, 34095, 42524, 22827, 5880, 750, 45, 1, 0, 1023, 28501, 145750, 246730, 179487, 63987, 11880, 1155, 55, 1]

cp's OEIS Frontend

A137651 Triangle read by rows: T(n,k) is the number of primitive (aperiodic) word structures of length n using exactly k different symbols.

Table of values

List of values