A086327 - cp's OEIS frontend

A086327 Number of factors over Q in the factorization of the Chebyshev polynomial of the second kind U_n(x).

n	a(n)
1	1
2	2
3	2
4	2
5	4
6	2
7	3
8	4
9	4
10	2
11	6
12	2
13	4
14	6
15	4
16	2
17	7
18	2
19	6
20	6
21	4
22	2
23	8
24	4
25	4
26	6
27	6
28	2
29	10
30	2
31	5
32	6
33	4
34	6
35	10
36	2
37	4
38	6
39	8
40	2
41	10
42	2
43	6
44	10
45	4
46	2
47	10
48	4
49	7
50	6
51	6
52	2
53	10
54	6
55	8
56	6
57	4
58	2
59	14
60	2
61	4
62	10
63	6
64	6
65	10
66	2
67	6
68	6
69	10
70	2
71	13
72	2
73	4
74	10
75	6
76	6
77	10
78	2
79	10
80	8
81	4
82	2
83	14
84	6
85	4
86	6
87	8
88	2
89	16
90	6
91	6
92	6
93	4
94	6
95	12
96	2
97	7
98	10
99	10
100	2
101	10
102	2
103	8
104	14
105	4

[1, 2, 2, 2, 4, 2, 3, 4, 4, 2, 6, 2, 4, 6, 4, 2, 7, 2, 6, 6, 4, 2, 8, 4, 4, 6, 6, 2, 10, 2, 5, 6, 4, 6, 10, 2, 4, 6, 8, 2, 10, 2, 6, 10, 4, 2, 10, 4, 7, 6, 6, 2, 10, 6, 8, 6, 4, 2, 14, 2, 4, 10, 6, 6, 10, 2, 6, 6, 10, 2, 13, 2, 4, 10, 6, 6, 10, 2, 10, 8, 4, 2, 14, 6, 4, 6, 8, 2, 16, 6, 6, 6, 4, 6, 12, 2, 7, 10, 10, 2, 10, 2, 8, 14, 4]

cp's OEIS Frontend

A086327 Number of factors over Q in the factorization of the Chebyshev polynomial of the second kind U_n(x).

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	2
5	4
6	2
7	3
8	4
9	4
10	2
11	6
12	2
13	4
14	6
15	4
16	2
17	7
18	2
19	6
20	6
21	4
22	2
23	8
24	4
25	4
26	6
27	6
28	2
29	10
30	2
31	5
32	6
33	4
34	6
35	10
36	2
37	4
38	6
39	8
40	2
41	10
42	2
43	6
44	10
45	4
46	2
47	10
48	4
49	7
50	6
51	6
52	2
53	10
54	6
55	8
56	6
57	4
58	2
59	14
60	2
61	4
62	10
63	6
64	6
65	10
66	2
67	6
68	6
69	10
70	2
71	13
72	2
73	4
74	10
75	6
76	6
77	10
78	2
79	10
80	8
81	4
82	2
83	14
84	6
85	4
86	6
87	8
88	2
89	16
90	6
91	6
92	6
93	4
94	6
95	12
96	2
97	7
98	10
99	10
100	2
101	10
102	2
103	8
104	14
105	4

n	a(n)
1	1
2	2
3	2
4	2
5	4
6	2
7	3
8	4
9	4
10	2
11	6
12	2
13	4
14	6
15	4
16	2
17	7
18	2
19	6
20	6
21	4
22	2
23	8
24	4
25	4
26	6
27	6
28	2
29	10
30	2
31	5
32	6
33	4
34	6
35	10
36	2
37	4
38	6
39	8
40	2
41	10
42	2
43	6
44	10
45	4
46	2
47	10
48	4
49	7
50	6
51	6
52	2
53	10
54	6
55	8
56	6
57	4
58	2
59	14
60	2
61	4
62	10
63	6
64	6
65	10
66	2
67	6
68	6
69	10
70	2
71	13
72	2
73	4
74	10
75	6
76	6
77	10
78	2
79	10
80	8
81	4
82	2
83	14
84	6
85	4
86	6
87	8
88	2
89	16
90	6
91	6
92	6
93	4
94	6
95	12
96	2
97	7
98	10
99	10
100	2
101	10
102	2
103	8
104	14
105	4

n	a(n)
1	1
2	2
3	2
4	2
5	4
6	2
7	3
8	4
9	4
10	2
11	6
12	2
13	4
14	6
15	4
16	2
17	7
18	2
19	6
20	6
21	4
22	2
23	8
24	4
25	4
26	6
27	6
28	2
29	10
30	2
31	5
32	6
33	4
34	6
35	10
36	2
37	4
38	6
39	8
40	2
41	10
42	2
43	6
44	10
45	4
46	2
47	10
48	4
49	7
50	6
51	6
52	2
53	10
54	6
55	8
56	6
57	4
58	2
59	14
60	2
61	4
62	10
63	6
64	6
65	10
66	2
67	6
68	6
69	10
70	2
71	13
72	2
73	4
74	10
75	6
76	6
77	10
78	2
79	10
80	8
81	4
82	2
83	14
84	6
85	4
86	6
87	8
88	2
89	16
90	6
91	6
92	6
93	4
94	6
95	12
96	2
97	7
98	10
99	10
100	2
101	10
102	2
103	8
104	14
105	4